Loudspeaker and terminal device
By using a multi-layer diaphragm structure and rigid components, the problem of limited amplitude and vibration area of loudspeakers in the process of making terminal devices thinner and lighter has been solved, thereby improving loudspeaker performance, especially enhancing low-frequency performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING XIAOMI MOBILE SOFTWARE CO LTD
- Filing Date
- 2023-02-27
- Publication Date
- 2026-07-31
AI Technical Summary
In the process of making terminal devices thinner and lighter, the amplitude and vibration area of loudspeakers are limited, resulting in poor performance, especially in the low frequency performance.
A multi-layer diaphragm structure is adopted, with the vibration direction of the second diaphragm intersecting that of the first diaphragm. The diaphragm is connected by a rigid component to ensure vibration stability and area expansion, avoid piston movement, and increase the vibration space and area.
Improve the amplitude and effective vibration area of the speaker, especially its low-frequency performance, to adapt to the thinner and lighter design of terminal devices.
Smart Images
Figure CN118555525B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of loudspeaker technology, and more specifically to a loudspeaker and a terminal device. Background Technology
[0002] As a crucial sound-generating unit in terminal devices, the effective vibrating area and amplitude of a loudspeaker are significant factors affecting its performance. With the trend towards thinner and lighter terminal devices (such as mobile phones and tablets), the size of loudspeakers is limited by the thickness of the device. Specifically, for loudspeakers whose amplitude is the same as the thickness of the terminal device, their amplitude is constrained by the device's thickness; for loudspeakers whose amplitude is perpendicular to the device's thickness, the size of their diaphragm in the thickness direction is limited. Even if the diaphragm is made into a long strip to increase the effective vibrating area, the loudspeaker's performance will still be poor. Summary of the Invention
[0003] This disclosure aims to at least partially address one of the technical problems in the related art.
[0004] Therefore, embodiments of this disclosure provide a loudspeaker to improve loudspeaker performance.
[0005] The loudspeaker of this embodiment includes a bracket and a vibration assembly. The bracket includes a receiving cavity with an opening. The vibration assembly includes a voice coil, a first diaphragm, and a second diaphragm. The voice coil and the first diaphragm are both disposed within the receiving cavity. The first diaphragm is connected to the voice coil, and the second diaphragm is connected to the bracket and covers the opening. The first diaphragm is disposed between the voice coil and the second diaphragm in its vibration direction, and the second diaphragm is capable of vibrating with the first diaphragm. The vibration direction of the second diaphragm intersects with the vibration direction of the first diaphragm, and the effective vibration area of the second diaphragm is larger than the effective vibration area of the first diaphragm.
[0006] In some embodiments, the vibration assembly further includes a third diaphragm connected to the bracket and disposed between the first diaphragm and the second diaphragm, with the bracket, the first diaphragm, and the third diaphragm forming a closed cavity; the vibration assembly further includes a rigid member with its two ends connected to the second diaphragm and the third diaphragm respectively; wherein the effective vibration area of the third diaphragm is smaller than the effective vibration area of the second diaphragm.
[0007] In some embodiments, the effective vibration area of the first diaphragm is equal to the effective vibration area of the third diaphragm.
[0008] In some embodiments, the centerline of the second diaphragm coincides with the centerline of the third diaphragm, and the centerline of the rigid member coincides with the centerline of the second diaphragm.
[0009] In some embodiments, the second diaphragm includes a second main body and a second folded ring portion disposed around the second main body; the third diaphragm includes a third main body and a third folded ring portion disposed around the third main body; and the two ends of the rigid member are respectively connected to the second main body and the third main body.
[0010] In some embodiments, the rigid member is a rigid rod extending along the vibration direction of the second diaphragm, and the cross-sectional area of the rigid rod is equal to the cross-sectional area of the third main body.
[0011] In some embodiments, the two ends of the rigid member are respectively bonded to the second diaphragm and the third diaphragm.
[0012] In some embodiments, the vibration assembly further includes a fourth diaphragm disposed on the side of the voice coil away from the first diaphragm, and the fourth diaphragm is connected to the voice coil and the support.
[0013] In some embodiments, the first diaphragm includes a first main body portion and a first folded loop portion disposed around the first main body portion; the fourth diaphragm includes a fourth main body portion and a fourth folded loop portion disposed around the fourth main body portion; in the vibration direction of the first diaphragm, the opposite sides of the voice coil are respectively connected to the first main body portion and the fourth main body portion.
[0014] In some embodiments, the vibration direction of the first diaphragm is perpendicular to the axial direction of the voice coil.
[0015] In some embodiments, the voice coil includes a wire wound around its axis, and the voice coil includes a first portion and a second portion disposed along the vibration direction of the first diaphragm; the loudspeaker further includes a magnetic circuit assembly disposed within the receiving cavity, the magnetic circuit assembly including a first magnetic component and a second magnetic component, the first magnetic component forming a first magnetic field, the second magnetic component forming a second magnetic field, the direction of the first magnetic field and the direction of the second magnetic field being opposite; the first portion is disposed within the first magnetic field, and the second portion is disposed within the second magnetic field.
[0016] In some embodiments, the vibration direction of the second diaphragm is perpendicular to the vibration direction of the first diaphragm, and the support includes a first sidewall and a second sidewall disposed opposite to each other along the vibration direction of the second diaphragm. Both the first sidewall and the second sidewall are flat. In the vibration direction of the second diaphragm, the opposite sides of the first diaphragm are respectively connected to the first sidewall and the second sidewall, and the opening is provided on the first sidewall.
[0017] In some embodiments, the support includes a third sidewall, with opposite sides of the third sidewall connected to the second sidewall and the second diaphragm respectively in the vibration direction of the second diaphragm; the third sidewall includes an inclined section that gradually tilts away from the second sidewall and away from the first diaphragm.
[0018] In some embodiments, the vibration direction of the second diaphragm is at an acute angle to the vibration direction of the first diaphragm, and the bracket includes a first sidewall and a second sidewall disposed opposite to each other in a direction perpendicular to the vibration direction of the first diaphragm. Both the first sidewall and the second sidewall are flat. In a direction perpendicular to the vibration direction of the first diaphragm, the opposite sides of the first diaphragm are respectively connected to the first sidewall and the second sidewall, and the opening is disposed between the first sidewall and the second sidewall.
[0019] In some embodiments, the vibration assembly further includes a rigid connector, the two ends of which are respectively connected to the first portion and the second portion.
[0020] Embodiments of this disclosure also propose a terminal device.
[0021] The terminal device of this disclosure includes a housing and a speaker. The housing has a mounting cavity and a sound guide hole communicating with the mounting cavity. The speaker is a speaker as described in any of the above embodiments. The speaker is disposed in the mounting cavity, and the sound from the speaker is emitted through the sound guide hole.
[0022] When the loudspeaker of this embodiment is used in a terminal device, the vibration direction of the first diaphragm can be arranged perpendicular to the thickness direction of the terminal device. By positioning the first diaphragm between the voice coil and the second diaphragm in its vibration direction, the voice coil, the first diaphragm, and the second diaphragm are arranged in a direction perpendicular to the thickness direction of the terminal device. For example, if the vibration direction of the first diaphragm is consistent with the width direction of the terminal device, then the voice coil, the first diaphragm, and the second diaphragm are arranged along the width direction of the terminal device. In this case, on the one hand, since the amplitude of the first diaphragm is not consistent with the thickness direction of the terminal device, the amplitude of the first diaphragm can be avoided from being limited by the thickness direction of the terminal device; on the other hand, since the arrangement direction of the voice coil, the first diaphragm, and the second diaphragm is not consistent with the thickness direction of the terminal device, the accommodating space for accommodating the voice coil and the vibration space for the second diaphragm in the terminal device will not be stacked along the thickness direction of the terminal device, thereby allowing the vibration space of the second diaphragm to be larger and the second diaphragm to have a larger amplitude. Furthermore, when the vibration direction of the first diaphragm is arranged perpendicular to the thickness direction of the terminal device, since the vibration direction of the second diaphragm intersects with that of the first diaphragm, the vibration direction of the second diaphragm does not need to be perpendicular to the thickness direction of the terminal device. This avoids the size of the second diaphragm being limited by the thickness of the terminal device, allowing for a larger size. Although the vibration direction of the first diaphragm is perpendicular to the thickness direction of the terminal device, thus limiting its size, as long as the size of the second diaphragm, which drives air vibration to produce sound, is large enough, the effective vibration area of the speaker diaphragm can be large. Therefore, the second diaphragm of the speaker can not only have a larger amplitude but also a larger effective vibration area, thereby effectively improving the speaker's performance, especially its low-frequency performance. Attached Figure Description
[0023] Figure 1 This is a cross-sectional view of the front view of a speaker according to an embodiment of the present disclosure.
[0024] Figure 2 This is a cross-sectional view of the front view of a speaker according to another embodiment of this disclosure.
[0025] Figure 3 This is a cross-sectional view of the front view of a speaker according to yet another embodiment of this disclosure.
[0026] Figure 4 This is a cross-sectional view of the front view of a speaker according to another embodiment of the present disclosure.
[0027] Figure label:
[0028] Speaker 100;
[0029] Support 1; Opening 11; Receiving cavity 12; Sealed chamber 13; Closed chamber 14; First side wall 15; Second side wall 16; Third side wall 17; Straight section 172; Inclined section 171;
[0030] Magnetic circuit assembly 2; first magnetic block 21; second magnetic block 22; third magnetic block 23; fourth magnetic block 24;
[0031] Vibrating assembly 3; voice coil 31; first part 311; second part 312; first diaphragm 32; first surround part 321; first main body part 322; second diaphragm 33; second surround part 331; second main body part 332; third diaphragm 34; third surround part 341; third main body part 342; fourth diaphragm 35; fourth surround part 351; fourth main body part 352; rigid member 36; connecting member 37; first dome 381; second dome 382; third dome 383; fourth dome 384. Detailed Implementation
[0032] Embodiments of this disclosure are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting it.
[0033] like Figures 1 to 4 As shown, the loudspeaker 100 of this embodiment includes a support 1 and a vibration assembly 3. The support 1 includes a receiving cavity 12 with an opening 11. The vibration assembly 3 includes a voice coil 31, a first diaphragm 32, and a second diaphragm 33. Both the voice coil 31 and the first diaphragm 32 are disposed within the receiving cavity 12. The first diaphragm 32 is connected to the voice coil 31, and the second diaphragm 33 is connected to the support 1 and covers the opening 11. The first diaphragm 32 is positioned between the voice coil 31 and the second diaphragm 33 in its vibration direction, and the second diaphragm 33 can vibrate with the first diaphragm 32. The vibration direction of the second diaphragm 33 intersects with the vibration direction of the first diaphragm 32, and the effective vibration area of the second diaphragm 33 is larger than the effective vibration area of the first diaphragm 32.
[0034] The second diaphragm 33 can vibrate with the first diaphragm 32 in that when the first diaphragm 32 vibrates, it transmits the vibration to the second diaphragm 33, causing the second diaphragm 33 to vibrate along with it. For example, the bracket 1, the first diaphragm 32, and the second diaphragm 33 form a sealed chamber 13. When the first diaphragm 32 vibrates, the medium inside the sealed chamber 13 undergoes a pressure change, and the second diaphragm 33 vibrates along with it due to this pressure change. The medium inside the sealed chamber can be a liquid or a gas. When the loudspeaker 100 is working, the voice coil 31 drives the first diaphragm 32 to vibrate, and the second diaphragm 33 vibrates along with it. The second diaphragm 33 then vibrates the air to produce sound.
[0035] In related technologies, the arrangement direction of the voice coil and diaphragm of a loudspeaker is consistent with the vibration direction of the diaphragm. For example, the voice coil and diaphragm are arranged along the height direction of the loudspeaker, and the vibration direction of the diaphragm is consistent with the height direction of the loudspeaker. When the height direction of the loudspeaker is consistent with the thickness direction of the terminal device, there must be both a space to accommodate the voice coil and diaphragm and a space for the diaphragm to vibrate in the thickness direction of the terminal device. Furthermore, these accommodating and vibration spaces are stacked along the thickness direction of the terminal device, causing the thickness of the terminal device to limit the amplitude of the diaphragm, ultimately resulting in poor loudspeaker performance. When the height direction of the loudspeaker is perpendicular to the thickness direction of the terminal device, although the thickness of the terminal device can avoid limiting the amplitude of the diaphragm, the thickness of the terminal device will limit the size of the diaphragm, still leading to poor loudspeaker performance.
[0036] When the loudspeaker 100 of this embodiment is used on a terminal device, the vibration direction of the first diaphragm 32 can be arranged perpendicular to the thickness direction of the terminal device. By positioning the first diaphragm 32 between the voice coil 31 and the second diaphragm 33 in its vibration direction, the voice coil 31, the first diaphragm 32, and the second diaphragm 33 are arranged in a direction perpendicular to the thickness direction of the terminal device. For example, if the vibration direction of the first diaphragm 32 is consistent with the width direction of the terminal device, then the voice coil 31, the first diaphragm 32, and the second diaphragm 33 are arranged along the width direction of the terminal device. In this case, on the one hand, since the amplitude of the first diaphragm 32 is not consistent with the thickness direction of the terminal device, the amplitude of the first diaphragm 32 can be avoided from being limited by the thickness direction of the terminal device; on the other hand, since the arrangement direction of the voice coil 31, the first diaphragm 32, and the second diaphragm 33 is not consistent with the thickness direction of the terminal device, the accommodating space for accommodating the voice coil and the vibration space for the second diaphragm 33 in the terminal device will not be stacked along the thickness direction of the terminal device, thereby allowing the vibration space of the second diaphragm 33 to be larger and the second diaphragm 33 to have a larger amplitude. Furthermore, when the vibration direction of the first diaphragm 32 is arranged perpendicular to the thickness direction of the terminal device, since the vibration direction of the second diaphragm 33 intersects with the vibration direction of the first diaphragm 32, the vibration direction of the second diaphragm 33 does not need to be perpendicular to the thickness direction of the terminal device. This avoids the size of the second diaphragm 33 being limited by the thickness of the terminal device, thus allowing the size of the second diaphragm 33 to be larger. Although the vibration direction of the first diaphragm 32 is perpendicular to the thickness direction of the terminal device, causing the size of the first diaphragm 32 to be limited by the thickness of the terminal device, as long as the size of the second diaphragm 33, which drives the air to vibrate and causes the speaker 100 to produce sound, is large, the effective vibration area of the speaker 100's diaphragm can be large.
[0037] Therefore, the second diaphragm 33 of the loudspeaker 100 can not only have a large amplitude, but also a large effective vibration area, thereby effectively improving the performance of the loudspeaker 100, especially the low-frequency performance of the loudspeaker 100.
[0038] In fact, the loudspeaker 100 of this embodiment is similar to the periscope principle in the related art. That is, through the above structural design, the vibration direction of the second diaphragm 33 is changed to be different from the vibration direction of the voice coil 31, so that the second diaphragm 33 can have a larger vibration space and a larger area.
[0039] In some embodiments, such as Figure 3 and Figure 4 As shown, the vibration assembly 3 also includes a third diaphragm 34, which is connected to the support 1 and positioned between the first diaphragm 32 and the second diaphragm 33. The support 1, the first diaphragm 32, and the third diaphragm 34 form a closed cavity 14. The vibration assembly 3 also includes a rigid member 36, with its two ends connected to the second diaphragm 33 and the third diaphragm 34, respectively. The effective vibration area of the third diaphragm 34 is smaller than that of the second diaphragm 33. The rigid member 36 should have sufficient rigidity, meaning it will not deform when the second diaphragm 33 and the third diaphragm 34 vibrate.
[0040] Understandably, if a sealed chamber 13 is directly formed between the support 1, the first diaphragm 32, and the second diaphragm 33, and the pressure change of the medium within this sealed chamber 13 causes the second diaphragm 33 to vibrate along with the first diaphragm 32, the effective vibration area of the second diaphragm 33 is larger than that of the first diaphragm 32. Therefore, the second diaphragm 33 is prone to unexpected piston-like motion (vibration), i.e., rolling vibration, which will still affect the performance of the speaker 100. Furthermore, the amplitude of the second diaphragm 33 will be smaller than that of the first diaphragm 32, which is detrimental to improving the performance of the speaker 100.
[0041] The loudspeaker 100 of this embodiment comprises a third diaphragm 34 disposed between a first diaphragm 32 and a second diaphragm 33. A bracket 1, the first diaphragm 32, and the third diaphragm 34 form a closed chamber 14. When the first diaphragm 32 vibrates, the medium within the closed chamber 14 undergoes a pressure change. The third diaphragm 34 vibrates in response to this pressure change. Since the effective vibration area of the third diaphragm 34 is smaller than that of the second diaphragm 33, unintended piston-like movements of the third diaphragm 34 and the amplitude of the third diaphragm 34 being less than that of the first diaphragm 32 can be effectively avoided. Furthermore, the second diaphragm 33 and the third diaphragm 34 are connected by a rigid member 36. The rigid member 36 transmits the vibration of the third diaphragm 34 to the second diaphragm 33, resulting in smoother piston-like movements of the second diaphragm 33. Since the amplitude of the second diaphragm 33 is comparable to that of the third diaphragm 34, the performance of the loudspeaker 100 can be effectively improved.
[0042] In fact, the third diaphragm 34 is mainly provided to change the vibration direction of the second diaphragm 33 while avoiding rolling vibration, and the rigid member 36 is provided to achieve stable transmission of vibration between the third diaphragm 34 and the second diaphragm 33. The vibration direction of the third diaphragm 34 can be the same as that of the second diaphragm 33, or they can form a small angle, for example, 0.1°.
[0043] Of course, in some other embodiments, the third diaphragm 34 may not be provided, and the bracket 1, the first diaphragm 32 and the second diaphragm 33 may form the aforementioned sealed chamber 13.
[0044] Optionally, the rigid component 36 can be made of other rigid materials such as carbon fiber.
[0045] Optionally, the effective vibration area of the first diaphragm 32 is equal to the effective vibration area of the third diaphragm 34. Therefore, the first diaphragm 32 and the third diaphragm 34 can have the same dimensions, which can more effectively prevent the second diaphragm 33 from exhibiting rolling vibration, thus further improving the performance of the loudspeaker 100.
[0046] Optionally, the first diaphragm 32 and the bracket 1 can be integrally injection molded, or the first diaphragm 32 can be made of rubber and fixed to the bracket 1 by hot pressing.
[0047] Optionally, the second diaphragm 33 and the bracket 1 can be integrally injection molded, or the second diaphragm 33 can be made of rubber and fixed to the bracket 1 by hot pressing.
[0048] Optionally, the third diaphragm 34 and the bracket 1 can be integrally injection molded, or the third diaphragm 34 can be made of rubber and fixed to the bracket 1 by hot pressing.
[0049] Optionally, the centerline of the second diaphragm 33 coincides with the centerline of the third diaphragm 34, and the centerline of the rigid member 36 coincides with the centerline of the second diaphragm 33. In other words, the centerlines of the second diaphragm 33, the third diaphragm 34, and the rigid member 36 all coincide. That is, the rigid member 36 is connected to the center position of the second diaphragm 33, and the rigid member 36 is connected to the center position of the third diaphragm 34.
[0050] Therefore, the vibration of the third diaphragm 34 can be transmitted to the second diaphragm 33 more stably through the rigid member 36, making the piston movement of the second diaphragm 33 smoother and helping to further improve the performance of the speaker 100.
[0051] Optionally, the second diaphragm 33 includes a second main body portion 332 and a second folded ring portion 331 disposed around the second main body portion 332. The third diaphragm 34 includes a third main body portion 342 and a third folded ring portion 341 disposed around the third main body portion 342. The two ends of the rigid member 36 are respectively connected to the second main body portion 332 and the third main body portion 342.
[0052] By providing a second folded ring portion 331 and a third folded ring portion 341 on the second diaphragm 33 and the third diaphragm 34 respectively, it is beneficial to further improve the vibration transmission stability of the third diaphragm 34 and the second diaphragm 33, and to further improve the performance of the loudspeaker 100.
[0053] Optionally, such as Figures 2 to 4 As shown, the vibration assembly 3 also includes a second dome 382 and a third dome 383. One end of the rigid member 36 is connected to the second main body 332 through the second dome 382, and the other end of the rigid member 36 is connected to the third main body 342 through the third dome 383.
[0054] Optionally, the vibration assembly 3 also includes a fourth diaphragm 35, which is located on the side of the voice coil 31 away from the first diaphragm 32, and is connected to the voice coil 31 and the support 1.
[0055] Therefore, in the vibration direction of the first diaphragm 32, one side of the voice coil 31 is connected to the bracket 1 through the first diaphragm 32, and the other side of the voice coil 31 is connected to the bracket 1 through the fourth diaphragm 35, which helps to improve the stability of the voice coil 31, thereby improving the reliability of the loudspeaker 100.
[0056] Optionally, the fourth diaphragm 35 and the bracket 1 can be integrally injection molded, or the fourth diaphragm 35 can be made of rubber and fixed to the bracket 1 by hot pressing.
[0057] Optionally, the first diaphragm 32 includes a first main body portion 322 and a first folded ring portion 321 disposed around the first main body portion 322. The fourth diaphragm 35 includes a fourth main body portion 352 and a fourth folded ring portion 351 disposed around the fourth main body portion 352. In the vibration direction of the first diaphragm 32, the opposite sides of the voice coil 31 are connected to the first main body portion 322 and the fourth main body portion 352, respectively.
[0058] By providing a first folded ring portion 321 and a fourth folded ring portion 351 on the first diaphragm 32 and the fourth diaphragm 35 respectively, it is beneficial to improve the vibration stability of the voice coil 31 and further improve the performance of the loudspeaker 100.
[0059] Optionally, such as Figures 2 to 4 As shown, the vibration assembly 3 also includes a first dome 381 and a fourth dome 384. One side of the voice coil 31 is connected to the first main body 322 through the first dome 381, and the other side of the voice coil 31 is connected to the fourth main body 352 through the fourth dome 384.
[0060] Optionally, the rigid member 36 is a rigid rod extending along the vibration direction of the second diaphragm 33, and the cross-sectional area of the rigid rod is equal to the cross-sectional area of the third main body 342.
[0061] The cross-sectional area of the rigid rod can be understood as the cross-sectional area of the rigid rod cut by a plane perpendicular to the vibration direction of the third diaphragm 34. The cross-sectional area of the third main body 342 can be understood as the cross-sectional area of the third main body 342 cut by a plane perpendicular to the vibration direction of the third diaphragm 34.
[0062] The cross-sectional area of the rigid rod is equal to the cross-sectional area of the third main body 342, which allows the vibration generated by the third diaphragm 34 to be transmitted more stably to the second diaphragm 33 through the rigid member 36, which is beneficial to further improve the performance of the loudspeaker 100.
[0063] Optionally, the two ends of the rigid member 36 are bonded to the second diaphragm 33 and the third diaphragm 34, respectively.
[0064] The rigid member 36 is bonded to the second diaphragm 33 and the third diaphragm 34, which facilitates the connection between the rigid member 36 and the second diaphragm 33 and the third diaphragm 34, thereby facilitating the assembly of the speaker 100.
[0065] Optionally, the vibration direction of the first diaphragm 32 is perpendicular to the axial direction of the voice coil 31.
[0066] Generally speaking, the axial dimension of the voice coil 31 is relatively small compared to the radial dimension. By setting the vibration direction of the first diaphragm 32 perpendicular to the axial direction of the voice coil 31, when the vibration direction of the first diaphragm 32 is arranged perpendicular to the thickness direction of the terminal device, the axial direction of the voice coil 31 can be consistent with the thickness direction of the terminal device. This allows the loudspeaker 100 to occupy less space in the thickness direction of the terminal device, which is beneficial to the thinner and lighter design of the terminal device.
[0067] Of course, in other embodiments, the vibration direction of the first diaphragm 32 may also be consistent with the axis of the voice coil 31.
[0068] Optionally, such as Figures 2 to 4 As shown, the voice coil 31 includes a wire wound around its axis, and the voice coil 31 includes a first portion 311 and a second portion 312 disposed along the vibration direction of the first diaphragm 32. The loudspeaker 100 also includes a magnetic circuit assembly 2 disposed within the receiving cavity 12. The magnetic circuit assembly 2 includes a first magnetic component and a second magnetic component. The first magnetic component forms a first magnetic field, and the second magnetic component forms a second magnetic field. The directions of the first magnetic field and the second magnetic field are opposite. The first portion 311 is disposed within the first magnetic field, and the second portion 312 is disposed within the second magnetic field. The first magnetic component provides a magnetic field for the vibration of the first portion 311, i.e., the first magnetic field; the second magnetic component provides a magnetic field for the vibration of the second portion 312, i.e., the second magnetic field.
[0069] It is understandable that the current direction of the first part 311 is opposite to that of the current direction of the second part 312. Since the directions of the first magnetic field and the second magnetic field are opposite, the vibration direction of the first part 311 and the vibration direction of the second part 312 are the same, that is, the vibration direction of the first part 311 and the vibration direction of the second part 312 are both consistent with the vibration direction of the first diaphragm 32.
[0070] By implementing the above design, the magnetic circuit assembly 2 can provide a larger magnetic field for the vibration of the voice coil 31, so that the voice coil 31 has a larger amplitude under the premise of the compact structure of the magnetic circuit assembly 2 and the voice coil 31, which is more conducive to the thinner and lighter design of the terminal device.
[0071] like Figures 2 to 4 As shown, the magnetic circuit assembly 2 includes a first magnetic block 21, a second magnetic block 22, a third magnetic block 23, and a fourth magnetic block 24. The magnetic poles of the first magnetic block 21 and the second magnetic block 22 are opposite, and the magnetic poles of the third magnetic block 23 and the fourth magnetic block 24 are also opposite. Along the axial direction of the voice coil 31, a first portion 311 is disposed between the first magnetic block 21 and the second magnetic block 22, and a second portion 312 is disposed between the third magnetic block 23 and the fourth magnetic block 24. The first magnetic block 21 and the second magnetic block 22 form a first magnetic assembly, and the third magnetic block 23 and the fourth magnetic block 24 form a second magnetic assembly.
[0072] Optionally, the first magnetic block 21, the second magnetic block 22, the third magnetic block 23 and the fourth magnetic block 24 are all bonded to the bracket 1.
[0073] Of course, in other embodiments, the magnetic circuit assembly can also be configured in other forms, as long as the voice coil 31 can move back and forth along the vibration direction of the first diaphragm 32, that is, as long as the voice coil 31 can drive the first diaphragm 32 to vibrate in a preset direction.
[0074] Optionally, the fourth diaphragm 35 is bonded to the first part 311, and the first diaphragm 32 is bonded to the second part 312.
[0075] Optionally, such as Figures 2 to 4 As shown, the vibration assembly 3 also includes a rigid connector 37, with its two ends connected to the first part 311 and the second part 312, respectively. In other words, the first part 311 and the second part 312 are connected by the connector 37. The connector 37 should have sufficient rigidity, meaning it will not deform when the first part 311 and the second part 312 vibrate.
[0076] The first part 311 and the second part 312 are connected by the connector 37, which helps to further improve the vibration stability of the voice coil 31 and further improve the performance of the loudspeaker 100.
[0077] Optionally, such as Figure 1 and Figure 3 As shown, the vibration direction of the second diaphragm 33 is perpendicular to the vibration direction of the first diaphragm 32. The support 1 includes a first sidewall 15 and a second sidewall 16 disposed opposite to each other along the vibration direction of the second diaphragm 33, both the first sidewall 15 and the second sidewall 16 being flat. In the vibration direction of the second diaphragm 33, the opposite sides of the first diaphragm 32 are connected to the first sidewall 15 and the second sidewall 16 respectively, and the opening 11 is provided in the first sidewall 15.
[0078] The vibration direction of the second diaphragm 33 can be consistent with the height direction of the speaker 100 (e.g., the axial direction of the voice coil 31). By setting the bracket 1 to the above structure, on the one hand, the structure of the bracket 1 is simple, which facilitates the processing and manufacturing of the speaker 100; on the other hand, the two side walls in the height direction of the speaker 100, namely the first side wall 15 and the second side wall 16, are both flat, which facilitates the speaker 100 to be arranged inside the terminal device.
[0079] Optionally, such as Figure 1 and Figure 3As shown, the bracket 1 includes a third sidewall 17. In the vibration direction of the second diaphragm 33, the opposite sides of the third sidewall 17 are connected to the first sidewall 15 and the second diaphragm 33, respectively. The third sidewall 17 includes an inclined section 171, which gradually tilts away from the second sidewall 16 and away from the first diaphragm 32.
[0080] By configuring the third sidewall 17 to include an inclined section 171, and the inclined section 171 gradually tilts away from the second sidewall 16 and away from the first diaphragm 32, the size of the end of the bracket 1 away from the second diaphragm 33 is smaller, and the size of the end of the bracket 1 close to the second diaphragm 33 is larger. This results in a larger opening 11 while maintaining a smaller overall size of the bracket 1, thus increasing the effective vibration area of the second diaphragm 33.
[0081] This allows for improved performance of the speaker 100 while maintaining a relatively small overall size of the bracket 1.
[0082] Optionally, such as Figure 1 and Figure 3 As shown, the third sidewall 17 also includes a straight section 172, and in the vibration direction of the second diaphragm 33, the inclined section 171 is disposed closer to the second diaphragm 33 than the straight section 172.
[0083] Optionally, such as Figure 2 and Figure 4 As shown, the vibration direction of the second diaphragm 33 forms an acute angle with the vibration direction of the first diaphragm 32. The support 1 includes a first sidewall 15 and a second sidewall 16 disposed opposite each other in a direction perpendicular to the vibration direction of the first diaphragm 32, both being flat. In a direction perpendicular to the vibration direction of the first diaphragm 32, opposite sides of the first diaphragm 32 are connected to the first sidewall 15 and the second sidewall 16 respectively, and an opening 11 is disposed between the first sidewall 15 and the second sidewall 16.
[0084] The vibration direction of the second diaphragm 33 can intersect with the height direction of the loudspeaker 100 (e.g., the axial direction of the voice coil 31). By setting the bracket 1 to the above structure, on the one hand, the structure of the bracket 1 is simple, which facilitates the processing and manufacturing of the loudspeaker 100; on the other hand, the two side walls in the height direction of the loudspeaker 100, namely the first side wall 15 and the second side wall 16, are both flat, which facilitates the loudspeaker 100 to be arranged inside the terminal device.
[0085] Embodiments of this disclosure also propose a terminal device.
[0086] The terminal device of this disclosure includes a housing and a speaker 100. The housing has a mounting cavity and a sound guide hole communicating with the mounting cavity. The speaker 100 is the speaker 100 of any of the above embodiments. The speaker 100 is disposed in the mounting cavity, and the sound of the speaker 100 is discharged through the sound guide hole.
[0087] Since the speaker 100 of this embodiment has advantages such as good performance, the terminal device of this embodiment also has advantages such as good performance.
[0088] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 disclosure and simplifying the description, and are not intended to 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 disclosure.
[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0090] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.
[0091] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0092] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0093] Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the scope of protection of the present disclosure.
Claims
1. A loudspeaker (100) characterized by, include: The support (1) includes a receiving cavity (12) having an opening (11). and Vibration assembly (3), the vibration assembly (3) includes a voice coil (31), a first diaphragm (32), a second diaphragm (33) and a third diaphragm (34), the voice coil (31) and the first diaphragm (32) are both disposed in the receiving cavity (12), the first diaphragm (32) is connected to the voice coil (31), the second diaphragm (33) is connected to the bracket (1) and covers the opening (11), the first diaphragm (32) is disposed between the voice coil (31) and the second diaphragm (33) in its vibration direction, and the second diaphragm (33) can vibrate with the first diaphragm (32); The vibration direction of the second diaphragm (33) intersects with the vibration direction of the first diaphragm (32). The effective vibration area of the second diaphragm (33) is greater than that of the first diaphragm (32). The third diaphragm (34) is connected to the bracket (1). The third diaphragm (34) is located between the first diaphragm (32) and the second diaphragm (33). The bracket (1), the first diaphragm (32), and the third diaphragm (34) form a closed cavity (14). The effective vibration area of the third diaphragm (34) is smaller than that of the second diaphragm (33).
2. The loudspeaker (100) of claim 1, characterized in that The vibration assembly (3) also includes a rigid member (36), the two ends of which are connected to the second diaphragm (33) and the third diaphragm (34), respectively.
3. The loudspeaker (100) of claim 2, characterized in that The effective vibration area of the first diaphragm (32) is equal to the effective vibration area of the third diaphragm (34).
4. The loudspeaker (100) of claim 2, characterized in that The center line of the second diaphragm (33) coincides with the center line of the third diaphragm (34), and the center line of the rigid member (36) coincides with the center line of the second diaphragm (33).
5. The loudspeaker (100) of claim 2, characterized in that The second diaphragm (33) includes a second main body (332) and a second folded ring (331) disposed around the second main body (332); The third diaphragm (34) includes a third main body (342) and a third folded ring (341) arranged around the third main body (342). The two ends of the rigid member (36) are connected to the second main body (332) and the third main body (342), respectively.
6. The loudspeaker (100) of claim 5, characterized in that The rigid member (36) is a rigid rod extending along the vibration direction of the second diaphragm (33), and the cross-sectional area of the rigid rod is equal to the cross-sectional area of the third main body (342).
7. The loudspeaker (100) according to claim 2, characterized in that, The two ends of the rigid member (36) are respectively bonded to the second diaphragm (33) and the third diaphragm (34).
8. The loudspeaker (100) according to any one of claims 1-7, characterized in that, The vibration assembly (3) further includes a fourth diaphragm (35), which is located on the side of the voice coil (31) away from the first diaphragm (32) and is connected to the voice coil (31) and the support (1).
9. The loudspeaker (100) according to claim 8, characterized in that, The first diaphragm (32) includes a first main body (322) and a first folded ring (321) disposed around the first main body (322). The fourth diaphragm (35) includes a fourth main body (352) and a fourth folded ring (351) arranged around the fourth main body (352). In the vibration direction of the first diaphragm (32), the opposite sides of the voice coil (31) are connected to the first main body (322) and the fourth main body (352), respectively.
10. The loudspeaker (100) according to any one of claims 1-7, characterized in that, The vibration direction of the first diaphragm (32) is perpendicular to the axial direction of the voice coil (31).
11. The loudspeaker (100) according to claim 10, characterized in that, The voice coil (31) includes a wire wound around its axis, and the voice coil (31) includes a first part (311) and a second part (312) arranged along the vibration direction of the first diaphragm (32). The loudspeaker (100) further includes a magnetic circuit assembly (2), which is disposed in the receiving cavity (12). The magnetic circuit assembly (2) includes a first magnetic component and a second magnetic component. The first magnetic component forms a first magnetic field, and the second magnetic component forms a second magnetic field. The direction of the first magnetic field is opposite to the direction of the second magnetic field. The first part (311) is located within the first magnetic field, and the second part (312) is located within the second magnetic field.
12. The loudspeaker (100) according to claim 10, characterized in that, The vibration direction of the second diaphragm (33) is perpendicular to the vibration direction of the first diaphragm (32). The bracket (1) includes a first sidewall (15) and a second sidewall (16) arranged opposite to each other along the vibration direction of the second diaphragm (33). Both the first sidewall (15) and the second sidewall (16) are flat. In the vibration direction of the second diaphragm (33), the opposite sides of the first diaphragm (32) are connected to the first sidewall (15) and the second sidewall (16) respectively, and the opening (11) is provided on the first sidewall (15).
13. The loudspeaker (100) according to claim 12, characterized in that, The bracket (1) includes a third sidewall (17), and in the vibration direction of the second diaphragm (33), the opposite sides of the third sidewall (17) are respectively connected to the second sidewall (16) and the second diaphragm (33); The third sidewall (17) includes an inclined section (171) that gradually tilts away from the second sidewall (16) and away from the first diaphragm (32).
14. The loudspeaker (100) according to claim 11, characterized in that, The vibration direction of the second diaphragm (33) is at an acute angle to the vibration direction of the first diaphragm (32). The bracket (1) includes a first sidewall (15) and a second sidewall (16) arranged opposite each other in a direction perpendicular to the vibration direction of the first diaphragm (32). Both the first sidewall (15) and the second sidewall (16) are flat. In a direction perpendicular to the vibration direction of the first diaphragm (32), the opposite sides of the first diaphragm (32) are connected to the first sidewall (15) and the second sidewall (16) respectively, and the opening (11) is provided between the first sidewall (15) and the second sidewall (16).
15. The loudspeaker (100) according to claim 11, characterized in that, The vibration assembly (3) further includes a rigid connector (37), the two ends of which are connected to the first part (311) and the second part (312) respectively.
16. A terminal device, characterized in that, include: A housing having a mounting cavity and a sound guide hole communicating with the mounting cavity; and The loudspeaker (100) is the loudspeaker (100) according to any one of claims 1-15, the loudspeaker (100) is disposed in the mounting cavity, and the sound of the loudspeaker (100) is discharged through the sound guide hole.