Loudspeaker

Abstract

The present invention relates to the technical field of electroacoustics. Provided is a loudspeaker, comprising: a basket; and a vibration system and a magnetic circuit system, which are fixed to the basket, wherein the vibration system comprises a diaphragm fixed to the basket and a voice coil assembly configured to drive the diaphragm to vibrate and produce sound; the voice coil assembly comprises a first voice coil and a second voice coil, which are located on the diaphragm and arranged side by side in a first direction; the vibration system further comprises a first flexible assembly for conduction between the first voice coil and the second voice coil, and a second flexible assembly for connection between the voice coil assembly and an external circuit, the first flexible assembly and the second flexible assembly being arranged on two opposite sides of the voice coil assembly in a second direction perpendicular to the first direction; and the first flexible assembly comprises two first flexible support members arranged in the first direction and a conducting portion connecting the two first flexible support members, and the first voice coil and the second voice coil are connected in series by means of the conducting portion. The loudspeaker of the present invention can not only improve the utilization rate of the magnetic field by the voice coil, but also increase the magnetic field strength, thereby improving the acoustic performance of the product.

Description

speaker Technical Field

[0001] This invention relates to the field of acoustic and electronic technology, and more particularly to a loudspeaker. Background Technology

[0002] With the development of science and technology, portable electronic products, such as mobile phones, handheld game consoles, navigation devices, or handheld multimedia entertainment devices, are widely used in people's daily lives. Among these mobile electronic devices, the voice playback device is an essential component. The quality of the voice directly affects the user experience when using these mobile electronic devices, so the requirements for the speakers used in them are getting higher and higher.

[0003] The relevant loudspeaker technology includes a magnetic circuit system and a vibration system. The vibration system includes a diaphragm and a single voice coil attached to one side of the diaphragm. A flexible circuit board is connected to the voice coil to conduct current. The energized voice coil, under the action of the magnetic circuit system, can drive the diaphragm to vibrate, thereby realizing the sound production of the sound-generating device. However, due to the limited inner diameter of a single voice coil, the utilization rate of the magnetic field generated by the magnetic circuit system is not high, making it difficult to improve the high-frequency and low-frequency performance of ultra-thin loudspeaker units.

[0004] Therefore, it is necessary to provide a product that solves the above problems. Technical issues

[0005] The purpose of this invention is to provide a loudspeaker that can not only improve the utilization rate of the voice coil for the magnetic field, but also increase the magnetic field strength, thereby improving the acoustic performance of the product. Technical solutions

[0006] To achieve the above objectives, the present invention provides a loudspeaker, including a frame, a vibration system and a magnetic circuit system fixed to the frame, wherein the vibration system includes a diaphragm fixed to the frame and a voice coil assembly that drives the diaphragm to vibrate and produce sound.

[0007] The voice coil assembly includes a first voice coil and a second voice coil located on the side of the diaphragm near the magnetic circuit system and arranged side by side along a first direction;

[0008] The vibration system further includes a first flexible component fixed to the frame and conducting the first voice coil and the second voice coil, and a second flexible component connecting the voice coil assembly and an external circuit. The first flexible component and the second flexible component are disposed on opposite sides of the voice coil assembly along a second direction perpendicular to the first direction.

[0009] Both the first direction and the second direction are perpendicular to the vibration direction of the diaphragm.

[0010] The first flexible component includes two first flexible support members arranged along the first direction and a conductive part connecting the two first flexible support members, wherein the first voice coil and the second voice coil are connected in series through the conductive part.

[0011] Preferably, each of the two first flexible support members includes a first elastic arm fixed to the frame, a first support portion extending from the first elastic arm toward the diaphragm, and a first lead wire connection portion fixed to the diaphragm extending from the first support portion toward the direction away from the first elastic arm, wherein the conductive portion connects the two first lead wire connection portions.

[0012] Preferably, the second flexible component includes two second flexible support members arranged along the first direction. Each of the two second flexible support members includes a second elastic arm fixed to the frame, a second support portion extending from the second elastic arm toward the diaphragm, and a second lead connection portion extending from the second support portion toward the diaphragm and fixed to the diaphragm. The second elastic arm is provided with a solder pad for connecting external circuits.

[0013] Preferably, the magnetic circuit system includes a lower clamping plate, two inner magnetic circuit portions connected to the lower clamping plate, and an outer magnetic circuit portion surrounding the two inner magnetic circuit portions. A first voice coil is disposed around one of the two inner magnetic circuit portions, and a second voice coil is disposed around the other of the two inner magnetic circuit portions. The two inner magnetic circuit portions and the outer magnetic circuit portion together form a magnetic gap, and both the first voice coil and the second voice coil are inserted into the magnetic gap.

[0014] Preferably, the two inner magnetic circuit portions include inner magnets fixed to the lower clamping plate and inner pole cores covering the inner magnets on the side away from the lower clamping plate, and the outer magnetic circuit portion includes outer magnets fixed to the lower clamping plate and outer pole cores covering the outer magnets on the side away from the lower clamping plate.

[0015] Preferably, the outer pole core includes two first sides extending along the first direction and two first protrusions extending from the two first sides in a direction away from the voice coil assembly, the two first protrusions being fixedly connected to the frame.

[0016] Preferably, the external magnet includes two first external magnet segments extending along the first direction and disposed on opposite sides of the voice coil assembly, and two second protrusions extending from the two first external magnet segments in a direction away from the voice coil assembly and fixedly fitted to the two first protrusions.

[0017] Preferably, the lower clamping plate includes a lower clamping plate body and a third protrusion extending from the lower clamping plate body in a direction away from the inner magnetic circuit portion. The third protrusion is disposed corresponding to the second protrusion along the vibration direction of the diaphragm and is fitted and fixed to the second protrusion.

[0018] Preferably, the outer magnet further includes two second outer magnet segments extending along the second direction and disposed on opposite sides of the voice coil assembly, and a third outer magnet segment spaced between the two inner magnets, wherein the length d1 of the second outer magnet segment along the second direction is greater than the length d2 of the third outer magnet segment along the second direction.

[0019] Preferably, the diaphragm includes a spherical top and a folded ring portion surrounding the spherical top, the first voice coil and the second voice coil are fixed to the spherical top, the spherical top includes a bent portion extending from the outer edge of the spherical top toward the magnetic circuit system and abutting against the first flexible support member, the bent portion having an opening to avoid the first protrusion. Beneficial effects

[0020] This invention provides a loudspeaker, including a frame, a vibration system and a magnetic circuit system fixed to the frame. The vibration system includes a diaphragm fixed to the frame and a voice coil assembly that drives the diaphragm to vibrate and produce sound. The voice coil assembly includes a first voice coil and a second voice coil arranged side by side along a first direction on the side of the diaphragm near the magnetic circuit system. The vibration system further includes a first flexible component fixed to the frame and conducting the first and second voice coils, and a second flexible component connecting the voice coil assembly and an external circuit. The first and second flexible components are arranged on opposite sides of the voice coil assembly along a second direction perpendicular to the first direction. Both the first and second directions are perpendicular to the vibration direction of the diaphragm. The first flexible component includes two first flexible supports arranged along the first direction and a conductive portion connecting the two first flexible supports. The first and second voice coils are connected in series through the conductive portion. By arranging multiple voice coils side by side, the inner diameter circumference of the voice coil can be effectively increased. With the same voice coil length (L value), the voice coil wall thickness can be smaller, resulting in a narrower magnetic gap, which can effectively improve the magnetic field strength (B value). At the same time, multiple voice coils can significantly increase the dome support surface and improve the dome strength. A thinner dome can be used to achieve the same high-frequency performance, which is beneficial for the miniaturization and thinning of loudspeakers. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0022] Figure 1 is a perspective view of the loudspeaker of the present invention;

[0023] Figure 2 is an exploded view of the speaker of the present invention;

[0024] Figure 3 is a schematic diagram of the speaker diaphragm removal according to the present invention;

[0025] Figure 4 is a cross-sectional view of the loudspeaker of the present invention along line AA in Figure 1;

[0026] Figure 5 is a perspective view of the first flexible component of the loudspeaker of the present invention;

[0027] Figure 6 is a perspective view of the second flexible component of the loudspeaker of the present invention;

[0028] Figure 7 is a schematic diagram of the combination of the inner magnet and the outer magnet of the loudspeaker of the present invention;

[0029] Figure label:

[0030] 100. Speaker;

[0031] 1. Pot stand;

[0032] 2. Vibration system;

[0033] 21. Diaphragm; 211. Top of sphere; 2111. Bending part; 2111a. Opening part; 212. Folded part;

[0034] 22. Voice coil assembly; 221. First voice coil; 222. Second voice coil;

[0035] 23. First flexible component; 231. First flexible support; 2311. First elastic arm; 2312. First support portion; 2313. First lead wire connection portion; 232. Conductive portion;

[0036] 24. Second flexible component; 241. Second flexible support; 2411. Second spring arm; 2412. Second support portion; 2413. Second lead wire connection portion; 2414. Solder pad;

[0037] 3. Magnetic circuit system;

[0038] 31. Lower clamping plate; 311. Main body of lower clamping plate; 312. Third protrusion;

[0039] 32. Internal magnetic circuit section; 321. Internal magnet; 322. Internal pole core;

[0040] 33. External magnetic circuit section; 331. External magnet; 3311. First external magnetic segment; 3312. Second protrusion; 3313. Second external magnetic segment; 3314. Third external magnetic segment; 332. External pole core; 3321. First side; 3322. First protrusion;

[0041] 34. Magnetic gap. Embodiments of the present invention

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] As shown in Figures 1-7, the present invention provides a loudspeaker 100, including a frame 1, a vibration system 2 fixed to the frame 1 and a magnetic circuit system 3. The vibration system 2 includes a diaphragm 21 fixed to the frame 1 and a voice coil assembly 22 that drives the diaphragm 21 to vibrate and produce sound. The voice coil assembly 22 includes a first voice coil 221 and a second voice coil 222 located on the side of the diaphragm 21 close to the magnetic circuit system 3 and arranged side by side along a first direction.

[0044] The vibration system 2 also includes a first flexible component 23 fixed to the frame 1 and conducting the first voice coil 221 and the second voice coil 222, and a second flexible component 24 connecting the voice coil assembly 22 and the external circuit. The first flexible component 23 and the second flexible component 24 are arranged on opposite sides of the voice coil assembly 22 along a second direction perpendicular to the first direction.

[0045] The first flexible component 23 includes two first flexible support members 231 arranged along a first direction and a conductive part 232 connecting the two first flexible support members 231. The first voice coil 221 and the second voice coil 222 are connected in series through the conductive part 232.

[0046] By arranging multiple voice coils side by side, the inner diameter circumference of the voice coil can be effectively increased. With the same voice coil length (L value), the voice coil wall thickness can be smaller, resulting in a narrower magnetic gap, which can effectively improve the magnetic field strength (B value). At the same time, multiple voice coils can significantly increase the dome support surface and improve the dome strength. A thinner dome can be used to achieve the same high-frequency performance, which is beneficial for the miniaturization and thinning of loudspeakers.

[0047] It should be noted that in this embodiment, both the first direction and the second direction are perpendicular to the vibration direction of the diaphragm.

[0048] As shown in Figures 2 and 5, each of the two first flexible support members 231 includes a first elastic arm 2311 fixed to the frame 1, a first support portion 2312 extending from the first elastic arm 2311 toward the direction close to the diaphragm 21, and a first lead wire connection portion 2313 fixed to the diaphragm 21 extending from the first support portion 2312 toward the direction away from the first elastic arm 2311. The conductive portion 232 connects the two first lead wire connection portions 2313.

[0049] Furthermore, as shown in Figures 3 and 6, the second flexible component 24 includes two second flexible support members 241 arranged along the first direction. Each of the two second flexible support members 241 includes a second elastic arm 2411 fixed to the frame 1, a second support portion 2412 extending from the second elastic arm 2411 toward the direction close to the diaphragm 21, and a second lead wire connection portion 2413 extending from the second support portion 2412 away from the second elastic arm 2411 and fixed to the diaphragm 21. As shown in Figure 6, the second elastic arm 2411 is provided with a solder pad 2414 for connecting external circuits.

[0050] As shown in Figures 2-4, the magnetic circuit system 3 includes a lower clamping plate 31, two inner magnetic circuit portions 32 connected to the lower clamping plate 31, and an outer magnetic circuit portion 33 surrounding the two inner magnetic circuit portions 32. The two inner magnetic circuit portions 32 are correspondingly arranged with the voice coil assembly 22 and are respectively surrounded by a first voice coil 221 and a second voice coil 222. Specifically, the first voice coil surrounds one of the two inner magnetic circuit portions, and the second voice coil surrounds the other of the two inner magnetic circuit portions. The inner magnetic circuit portions 32 and the outer magnetic circuit portions 33 together form a magnetic gap 34, and both the first voice coil 221 and the second voice coil 222 are inserted into the magnetic gap 34. When the voice coil assembly 22 is energized, the magnetic field generated interacts with the magnetic circuit system 3, causing the diaphragm 21 to vibrate and produce sound.

[0051] As shown in Figure 4, both inner magnetic circuit portions 32 include an inner magnet 321 fixed to the lower clamping plate 31 and an inner pole core 322 covering the inner magnet 321 on the side away from the lower clamping plate. The outer magnetic circuit portion 33 includes an outer magnet 331 fixed to the lower clamping plate 31 and an outer pole core 332 covering the outer magnet 331 on the side away from the lower clamping plate.

[0052] Preferably, as shown in FIG2, the outer pole core 332 includes two first sides 3321 extending along a first direction and two first protrusions 3322 extending from the two first sides 3321 in a direction away from the voice coil assembly 22. The two first protrusions 3322 are fixedly connected to the frame 1. The arrangement of the first protrusions 3322 can improve the short axis strength of the speaker and effectively improve the situation of magnet damage caused by speaker drop, while meeting the requirements of speaker miniaturization and thinning.

[0053] As shown in Figures 2 and 7, the outer magnet 331 includes two first outer magnetic segments 3311 extending along a first direction and disposed on opposite sides of the voice coil assembly 22, and two second protrusions 3312 extending from the two first outer magnetic segments 3311 in a direction away from the voice coil assembly 22 and fixedly attached to the two first protrusions 3322. The provision of the second protrusions 3312 increases the volume of the magnet in the magnetic circuit system, improves the BL value, and thus makes the speaker's sound performance superior.

[0054] Furthermore, as shown in Figures 2 and 7, the outer magnet 331 also includes two second outer magnet segments 3313 extending along the second direction and disposed on opposite sides of the voice coil assembly 22, and a third outer magnet segment 3314 spaced between the two inner magnets 321. In this embodiment, the first outer magnet segment, the two second outer magnet segments, and the third outer magnet segment are separate magnets. Of course, in other embodiments, the first outer magnet segment 3311 and the two second outer magnet segments 3313 can be an integral magnet. Alternatively, the first outer magnet segment 3311, the two second outer magnet segments 3313, and the third outer magnet segment 3314 can also be an integral magnet. The second protrusion 3312 can be disposed on the integral magnet at a position corresponding to the first protrusion 3322 along the vibration direction of the diaphragm.

[0055] Preferably, as shown in Figure 7, the length d1 of the second outer magnetic segment 3313 along the second direction is greater than the length d2 of the third outer magnetic segment 3314 along the second direction.

[0056] Furthermore, the lower clamping plate 31 includes a lower clamping plate body 311 and a third protrusion 312 extending from the lower clamping plate body 311 in a direction away from the inner magnetic circuit portion 32. The third protrusion 312 is disposed corresponding to the second protrusion 3312 along the vibration direction and is attached and fixed to the second protrusion 3312.

[0057] Furthermore, the diaphragm 21 includes a dome 211 and a folded ring portion 212 surrounding the dome 211. The first voice coil 221 and the second voice coil 222 are fixed to the dome 211. The dome 211 includes a bent portion 2111 that bends and extends from the outer edge of the dome 211 toward the direction close to the magnetic circuit system 3 and abuts against the first flexible support member 231. The bent portion 2111 has an opening 2111a that avoids the first protrusion 3322. The opening 2111a can make the structure of the speaker more compact, which is an improvement made to meet the requirements of miniaturization and thinness. It is a preferred embodiment of the present invention.

[0058] Compared with related technologies, the speaker of the present invention can effectively increase the inner diameter circumference of the voice coil by arranging multiple voice coils side by side. With the same voice coil length (L value), the wall thickness can be smaller, thereby the magnetic gap can be smaller, which can effectively improve the magnetic field strength (B value). At the same time, multiple voice coils can significantly increase the dome support surface and improve the dome strength. The same high-frequency performance can be achieved with a thinner dome, which is beneficial to the miniaturization and thinning of the speaker.

[0059] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A loudspeaker, comprising a frame, a vibration system fixed to the frame, and a magnetic circuit system, the vibration system comprising a diaphragm fixed to the frame and a voice coil assembly for driving the diaphragm to vibrate and generate sound; characterized in that: The voice coil assembly includes a first voice coil and a second voice coil located on the side of the diaphragm near the magnetic circuit system and arranged side by side along a first direction; The vibration system further includes a first flexible component fixed to the frame and conducting the first voice coil and the second voice coil, and a second flexible component connecting the voice coil assembly and an external circuit. The first flexible component and the second flexible component are disposed on opposite sides of the voice coil assembly along a second direction perpendicular to the first direction. Both the first direction and the second direction are perpendicular to the vibration direction of the diaphragm. The first flexible component includes two first flexible support members arranged along the first direction and a conductive part connecting the two first flexible support members, wherein the first voice coil and the second voice coil are connected in series through the conductive part.

2. The loudspeaker according to claim 1, characterized in that: Both of the first flexible support members include a first elastic arm fixed to the frame, a first support portion extending from the first elastic arm toward the diaphragm, and a first lead wire connection portion fixed to the diaphragm extending from the first support portion toward the direction away from the first elastic arm. The conductive portion connects the two first lead wire connection portions.

3. The loudspeaker according to claim 1, characterized in that: The second flexible component includes two second flexible support members arranged along the first direction. Each of the two second flexible support members includes a second elastic arm fixed to the frame, a second support portion extending from the second elastic arm toward the diaphragm, and a second lead connection portion extending from the second support portion toward the diaphragm and fixed to the diaphragm. The second elastic arm is provided with a solder pad for connecting external circuits.

4. The loudspeaker according to claim 1, characterized in that: The magnetic circuit system includes a lower clamping plate, two inner magnetic circuit portions connected to the lower clamping plate, and an outer magnetic circuit portion surrounding the two inner magnetic circuit portions. A first voice coil is arranged around one of the two inner magnetic circuit portions, and a second voice coil is arranged around the other of the two inner magnetic circuit portions. The two inner magnetic circuit portions and the outer magnetic circuit portion together form a magnetic gap. Both the first voice coil and the second voice coil are inserted into the magnetic gap.

5. The loudspeaker according to claim 4, characterized in that: Both of the inner magnetic circuit portions include an inner magnet fixed to the lower clamping plate and an inner pole core covering the inner magnet on the side away from the lower clamping plate. The outer magnetic circuit portion includes an outer magnet fixed to the lower clamping plate and an outer pole core covering the outer magnet on the side away from the lower clamping plate.

6. The loudspeaker according to claim 5, characterized in that: The outer pole core includes two first sides extending along the first direction and two first protrusions extending from the two first sides in a direction away from the voice coil assembly, the two first protrusions being fixedly connected to the frame.

7. The loudspeaker according to claim 5, characterized in that: The external magnet includes two first external magnet segments extending along the first direction and disposed on opposite sides of the voice coil assembly, and two second protrusions extending from the two first external magnet segments in a direction away from the voice coil assembly and fixedly attached to the two first protrusions.

8. The loudspeaker according to claim 7, characterized in that: The lower clamping plate includes a lower clamping plate body and a third protrusion extending from the lower clamping plate body in a direction away from the inner magnetic circuit portion. The third protrusion is disposed corresponding to the second protrusion along the vibration direction of the diaphragm and is fitted and fixed to the second protrusion.

9. The loudspeaker according to claim 5, characterized in that: The outer magnet also includes two second outer magnet segments extending along the second direction and disposed on opposite sides of the voice coil assembly, and a third outer magnet segment spaced between the two inner magnets. The length d1 of the second outer magnet segment along the second direction is greater than the length d2 of the third outer magnet segment along the second direction.

10. The loudspeaker according to claim 6, characterized in that: The diaphragm includes a spherical top and a folded ring portion surrounding the spherical top. The first voice coil and the second voice coil are fixed to the spherical top. The spherical top includes a bent portion that extends from the outer edge of the spherical top toward the magnetic circuit system and abuts against the first flexible support member. The bent portion has an opening that avoids the first protrusion.

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