Back-to-back loudspeaker vibrating in same direction and sound production equipment

Abstract

The invention belongs to the technical field of loudspeakers, and discloses a back-to-back loudspeaker vibrating in the same direction and sound production equipment, and the loudspeaker comprises two vibrating diaphragm assemblies, two support assemblies, a voice coil and two permanent magnets. The two vibrating diaphragm assemblies are arranged at intervals along a first direction, each vibrating diaphragm assembly is provided with a first mounting groove extending along a second direction, each vibrating diaphragm assembly is provided with protruding parts which protrude towards each other, the support assemblies are connected to the vibrating diaphragm assemblies, each support assembly is provided with a second mounting groove which is arranged corresponding to the first mounting groove, and the first mounting groove and the second mounting groove are communicated with each other. The two sides of the voice coil in the first direction penetrate through the second installation groove and are connected with the first installation groove in a sealed mode, the two permanent magnets are located on the two sides of the voice coil in the third direction, and an inner cavity sound outlet is formed between the end of each permanent magnet in the second direction and the two support assemblies. According to the loudspeaker, the back space of the diaphragm assembly can be fully utilized, the acoustic performance and the sound effect are good, the loudspeaker is not limited by the length-width ratio, and the requirement of intelligent equipment can be better met.

Description

Technical Field

[0001] This invention relates to the field of loudspeaker technology, and more particularly to a back-to-back loudspeaker that vibrates in the same direction and a sound-generating device. Background Technology

[0002] Currently, the protrusions on the two diaphragms of elongated miniature speakers on the market are set away from each other. This structure not only fails to make good use of the back radiation of the diaphragms, but also results in a small length and width ratio. However, modern smart glasses require narrow bezels and speaker structures with a larger length and width ratio. Therefore, the existing elongated miniature speakers cannot meet the needs of smart glasses.

[0003] Furthermore, as the space inside electronic devices becomes smaller and smaller, the BL value (the product of the gap magnetic induction intensity B and the effective voice coil length L) of the loudspeaker is limited by the space size, resulting in fewer magnetic lines of force passing through the voice coil. This leads to a smaller magnetic force on the voice coil, resulting in low sensitivity of the sound-producing device and poor overall acoustic performance and sound effect. Summary of the Invention

[0004] The primary objective of this invention is to provide a back-to-back loudspeaker that vibrates in the same direction. This loudspeaker can fully utilize the space behind the diaphragm assembly, and has good acoustic performance and sound effects. It is not limited by aspect ratio and can better meet the needs of smart devices.

[0005] The second objective of this invention is to provide a sound-generating device with good acoustic performance and sound effect.

[0006] To achieve this objective, the present invention adopts the following technical solution: This invention discloses a back-to-back loudspeaker that vibrates in the same direction, comprising: two diaphragm assemblies spaced apart along a first direction, each diaphragm assembly having a first mounting groove extending along a second direction, and each diaphragm assembly having a protrusion convex towards each other; two support assemblies connected to the diaphragm assemblies, with the two support assemblies respectively located on opposite sides of the two diaphragm assemblies, each support assembly having a second mounting groove corresponding to the first mounting groove; a voice coil passing through the second mounting groove on both sides along the first direction and sealed to the first mounting groove; two permanent magnets located on both sides of the voice coil along a third direction, each permanent magnet being connected to the two support assemblies on both sides along the first direction, the magnetic poles of the permanent magnets located at both ends of the permanent magnets in the first direction, and the magnetic poles of the two permanent magnets being arranged in opposite directions, and an inner cavity sound outlet being formed between the end of each permanent magnet along the second direction and the two support assemblies; wherein: the first direction, the second direction, and the third direction are arranged perpendicularly to each other.

[0007] In some embodiments, the voice coil includes a multilayer circuit board, and the number of layers of the circuit board is even. Each layer of the circuit board has a ring-shaped ribbon cable with connecting bars on both the inner and outer sides. The ring-shaped ribbon cables on two adjacent circuit boards are electrically connected through the connecting bars. The connecting bars on the outer side of the uppermost ring-shaped ribbon cable are electrically connected to a wire. The connecting bars on the inner sides of two adjacent ring-shaped ribbon cables are electrically connected. The connecting bars on the outer side of the lowermost ring-shaped ribbon cable are electrically connected to a wire.

[0008] In some embodiments, the support assembly includes a top plate and a basin stand, the top plate having a fixing groove, and the basin stand being fixed within the fixing groove.

[0009] In some specific embodiments, a positioning protrusion is provided on one of the groove wall of the fixing groove and the outer peripheral wall of the top plate, and a positioning groove is provided on the other of the groove wall of the fixing groove and the outer peripheral wall of the top plate, and the positioning protrusion can be engaged with the positioning groove.

[0010] In some specific embodiments, there are multiple positioning protrusions and positioning grooves, and multiple positioning grooves or multiple positioning protrusions are provided on both sides of the top plate along the third direction.

[0011] In some specific embodiments, the second mounting groove includes a first groove and a second groove. The first groove is disposed on the basin frame, and the cross-section of the first groove gradually decreases in the direction close to the permanent magnet. The second groove is disposed on the top plate, and the second groove includes a straight section and a gradually expanding section connected to both ends of the straight section. The larger end of the gradually expanding section is connected to the straight section.

[0012] In some embodiments, each of the bracket assemblies has a half-hole at both ends along the second direction, and the two half-holes are located on both sides of the second mounting groove; the half-holes on the two bracket assemblies are spliced ​​together to form a lead wire hole, and at least one of the two lead wire holes is fitted with a wire of the voice coil.

[0013] In some embodiments, the bracket assembly is further provided with a positioning post and a positioning notch, the positioning post and the positioning notch being located on one side of the second mounting groove along a second direction, wherein: in the two bracket assemblies, the positioning post of one bracket assembly can be inserted into the positioning notch of the other bracket assembly.

[0014] In some embodiments, the diaphragm assembly includes a centering plate and a diaphragm. A first mounting groove is disposed on the centering plate, and a third mounting groove corresponding to the first mounting groove is provided on the diaphragm. The centering plate is mounted on the diaphragm, and the outer edge of the diaphragm is connected to the support assembly via a copper ring. A protrusion is disposed on the diaphragm and surrounds the centering plate. Sealant is filled between the two ends of the voice coil along the first direction and the first mounting groove on the centering plate to fix the voice coil on the centering plate.

[0015] The present invention also discloses a sound-generating device, including a housing and the back-to-back loudspeakers vibrating in the same direction as described above. The housing has a first sound outlet and a second sound outlet respectively provided on two sides opposite to each other along a third direction. The first sound outlet and the second sound outlet are staggered along a first direction. The housing and the back-to-back loudspeakers vibrating in the same direction define a first sound channel and a second sound channel. The first sound channel is connected to the first sound outlet, and the second sound channel is connected to the second sound outlet.

[0016] The beneficial effects of the co-vibrating back-to-back loudspeaker of the present invention are as follows: Each diaphragm assembly has a protrusion facing each other. Compared with the structure of the protrusions on the diaphragm in the prior art that are opposite to each other, the loudspeaker of the present invention can make full use of the space on the back of the diaphragm assembly (i.e., the space between the diaphragm assembly and the shell). Since the voice coil is set perpendicular to the two diaphragm assemblies, the two permanent magnets are located on both sides of the voice coil along the third direction, and the magnetic poles of the permanent magnets are located at the two ends of the permanent magnet in the first direction. The magnetic poles of the two permanent magnets are set in opposite directions. On the one hand, the magnetic lines of force are effectively concentrated and uniformly pass through the voice coil to form a magnetic circuit, which effectively improves the BL value, increases the sensitivity of the sound-generating device, effectively improves the flatness of the BL curve, significantly improves the frequency response curve, and effectively reduces harmonic distortion, so that the sound effect and performance of the loudspeaker are better improved. On the other hand, the aspect ratio of the loudspeaker can be set to be large. Even if the width of the entire loudspeaker is narrow, its sound effect can be ensured, thus better meeting the needs of smart devices.

[0017] The beneficial effects of the sound-generating device of the present invention are as follows: Since the sound-generating device has back-to-back loudspeakers that vibrate in the same direction as described above, and the outer shell is provided with a first sound outlet and a second sound outlet on two sides that are arranged opposite each other along a third direction, the radiation of the vibration of the two diaphragm components can be maximized, thereby making the sound-generating device have better acoustic performance and sound effect.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of a back-to-back loudspeaker that vibrates in the same direction according to an embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of a back-to-back loudspeaker vibrating in the same direction according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the diaphragm assembly of a back-to-back loudspeaker that vibrates in the same direction, according to an embodiment of the present invention. Figure 4 This is an exploded structural diagram of the diaphragm assembly of a back-to-back loudspeaker that vibrates in the same direction, according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the support assembly for a back-to-back loudspeaker that vibrates in the same direction, according to an embodiment of the present invention. Figure 6 This is an exploded structural diagram of the support assembly of the back-to-back loudspeakers that vibrate in the same direction according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the voice coil structure of a back-to-back loudspeaker that vibrates in the same direction according to an embodiment of the present invention; Figure 8 This is a cross-sectional schematic diagram of the sound-generating device according to an embodiment of the present invention.

[0020] Figure label: 100. Diaphragm assembly; 110. Centering plate; 111. First mounting slot; 120. Diaphragm; 121. Protrusion; 122. Third mounting slot; 130. Copper ring; 101. Inner cavity sound outlet; 200. Bracket assembly; 201. Second mounting slot; 2011. First slot; 2012. Second slot; 210. Basket; 211. Fixing slot; 212. Positioning groove; 213. Half hole; 214. Positioning post; 215. Positioning notch; 220. Top plate; 221. Positioning protrusion; 300. Voice coil; 310. Circuit board; 311. Connecting strip; 312. Ring cable; 400. Permanent magnet; 500. Sealant; 10. Housing; 11. First sound outlet; 12. Second sound outlet; 13. First sound outlet channel; 14. Second sound outlet channel. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0024] This invention discloses a back-to-back loudspeaker that vibrates in the same direction (hereinafter referred to as the loudspeaker for ease of description), see reference. Figures 1-2 As shown, the loudspeaker disclosed in this invention includes two diaphragm assemblies 100, two support assemblies 200, a voice coil 300, and two permanent magnets 400. The two diaphragm assemblies 100 are spaced apart along a first direction. Each diaphragm assembly 100 has a first mounting groove 111 extending along a second direction and a protrusion 121 protruding towards each other. The support assemblies 200 are connected to the diaphragm assemblies 100, and the two support assemblies 200 are respectively located on one side of the two diaphragm assemblies 100 facing each other. Each support assembly 200 has a second mounting groove 201 corresponding to the first mounting groove 111. The voice coil 300 extends along a first direction. The two sides of the voice coil 300 pass through the second mounting groove 201 and are sealed to the first mounting groove 111. Two permanent magnets 400 are located on both sides of the voice coil 300 along the third direction. Each permanent magnet 400 is connected to two support assemblies 200 on both sides along the first direction. The magnetic poles of the permanent magnets 400 are located at both ends of the permanent magnets 400 in the first direction, and the magnetic poles of the two permanent magnets 400 are arranged in opposite directions. An inner cavity sound outlet 101 is formed between the end of each permanent magnet 400 along the second direction and the two support assemblies 200. The first direction, the second direction, and the third direction are arranged perpendicularly to each other. In this embodiment, the first direction is the thickness direction of the speaker, the second direction is the length direction of the speaker, and the third direction is the width direction of the speaker.

[0025] It is understood that each diaphragm assembly 100 is provided with a protrusion 121 that protrudes towards each other. Compared with the structure of the protrusions on the diaphragm in the prior art that are opposite to each other, the speaker of the present invention can make full use of the space on the back of the diaphragm assembly 100 (i.e. the space between the diaphragm assembly 100 and the housing 10). Since the voice coil 300 is arranged perpendicularly to the two diaphragm assemblies 100, and the two permanent magnets 400 are located on both sides of the voice coil 300 along the third direction, the magnetic poles of the permanent magnets 400 are located at both ends of the permanent magnets 400 in the first direction, and the magnetic poles of the two permanent magnets 400 are arranged in opposite directions, on the one hand, the magnetic lines of force are effectively concentrated and uniformly pass through the voice coil 300 to form a magnetic circuit, effectively improving the BL value, increasing the sensitivity of the sound-generating device, effectively improving the flatness of the BL curve, significantly improving the frequency response curve and effectively reducing harmonic distortion, so that the sound effect and performance of the speaker are better improved. On the other hand, the aspect ratio of the speaker can be set to be large, and even if the width of the entire speaker is narrow, its sound effect can be ensured, thereby better meeting the needs of smart devices.

[0026] refer to Figures 2-4 As shown, the diaphragm assembly 100 includes a centering plate 110 and a diaphragm 120. A first mounting groove 111 is provided on the centering plate 110, and a third mounting groove 122 corresponding to the first mounting groove 111 is provided on the diaphragm 120. The centering plate 110 is mounted on the diaphragm 120, and the outer edge of the diaphragm 120 is connected to the bracket assembly 200 through a copper ring 130. A protrusion 121 is provided on the diaphragm 120 and surrounds the centering plate 110. It can be understood that the diaphragm assembly 100 includes a centering plate 110 and a diaphragm 120, and the protrusion 121 is provided on the diaphragm 120 and surrounds the centering plate 110. The centering plate 110 is used to install the voice coil 300, which can fully utilize the space between the diaphragm assembly 100 and the housing 10, thereby ensuring the sound effect of the speaker.

[0027] Optionally, sealant 500 is filled between the two ends of the voice coil 300 along the first direction and the first mounting groove 111 on the centering plate 110 to fix the voice coil 300 to the centering plate 110. It is understood that the connection between the voice coil 300 and the centering plate 110 is achieved by filling with sealant 500. This ensures the stability of the fixation between the voice coil 300 and the centering plate 110, preventing sound distortion caused by voice coil 300 misalignment. It also ensures the stability of the connection between the voice coil 300 and the centering plate 110, preventing external contaminants from entering the speaker through the gap between the voice coil 300 and the centering plate 110 and affecting the normal operation of the speaker. It should be noted that, in the embodiments of the present invention, the type of sealant 500 can be selected according to actual needs. In addition, to ensure the connection stability between the voice coil 300 and the centering plate 110, after the sealant 500 has cured, part of it fills the gap between the voice coil 300 and the first mounting groove 111, and the other part is cured on the centering plate 110 and surrounds the voice coil 300.

[0028] Optional, see reference Figure 2 , Figures 5-6 As shown, the support assembly 200 includes a basin frame 210 and a top plate 220. The basin frame 210 is provided with a fixing groove 211, and the top plate 220 is fixed in the fixing groove 211. It can be understood that the fixing groove 211 on the basin frame 210 is used to fix the top plate 220, which can ensure the connection stability of the top plate 220. In actual operation, the top plate 220 is first fixed in the fixing groove 211, and then the entire diaphragm assembly 100 is fixed to the basin frame 210 by adhesive.

[0029] Optionally, a positioning protrusion 221 is provided on the outer peripheral wall of the top plate 220, and a positioning groove 212 is provided on the groove wall of the fixing groove 211, so that the positioning protrusion 221 can be engaged with the positioning groove 212. It can be understood that the engagement of the positioning protrusion 221 and the positioning groove 212 between the top plate 220 and the basin frame 210 can ensure the installation stability of the top plate 220 and the basin frame 210, ensure the structural stability of the support assembly 200, and thus indirectly ensure the installation stability of the diaphragm assembly 100.

[0030] Optionally, there may be multiple positioning protrusions 221 and positioning grooves 212, with the multiple positioning protrusions 221 located on both sides of the top plate 220 along a third direction. It is understood that the cooperation of multiple positioning grooves 212 and multiple positioning protrusions 221 further ensures the installation stability of the top plate 220 and the frame 210, ensures the structural stability of the support assembly 200, and thus indirectly ensures the installation stability of the diaphragm assembly 100. In this embodiment, seven positioning protrusions 221 are provided on one side of the top plate 220 along a third direction. Of course, in other embodiments of the present invention, the number of positioning protrusions 221 can be adjusted according to actual needs. It should be noted that in other embodiments of the present invention, the positioning protrusions 221 can be located on the wall of the fixing groove 211, and the positioning grooves 212 can be located on the top plate 220.

[0031] It is understood that the second mounting slot 201 includes a first slot 2011 and a second slot 2012. The first slot 2011 is mounted on the frame 210, and its cross-section gradually decreases in the direction close to the permanent magnet 400. The second slot 2012 is mounted on top and includes a straight section and gradually expanding sections connecting the two ends of the straight section. The larger end of the gradually expanding section is connected to the straight section. It is understood that the first slot 2011 is formed as a wedge-shaped slot to facilitate sound diffusion and to facilitate the installation of the top plate 220. The second slot 2012 includes a straight section and gradually expanding sections connecting the two ends of the straight section. The larger end of the gradually expanding section is connected to the straight section. The second slot 2012 is narrow in the middle and wide at both ends, facilitating the installation of the voice coil 300 and improving the installation stability of the voice coil 300.

[0032] refer to Figures 5-6 As shown, each frame 210 has a half-hole 213 at both ends along the second direction, and the two half-holes 213 are located on both sides of the second mounting groove 201; the half-holes 213 on the two bracket assemblies 200 are joined together to form a lead wire hole, and at least one of the two lead wire holes is fitted with a wire of the voice coil 300. It can be understood that with the half-holes 213 at both ends of the two bracket assemblies 200 along the second direction, and the two half-holes 213 joined together to form a lead wire hole, in the actual assembly process, the voice coil 300 has two wires, one input wire and one output terminal. The input wire and the output terminal can be fitted into the same lead wire hole, at which point the speaker wire is led out from one end in the second direction. Alternatively, the input wire and the output terminal can be fitted into two lead wire holes, at which point the speaker wire is led out from both ends in the second direction. In the actual assembly process, the wires can be connected according to actual needs, facilitating user assembly.

[0033] Optionally, the frame 210 is also provided with a positioning post 214 and a positioning notch 215, which are located on one side of the second mounting groove 201 along the second direction. In this configuration, the positioning post 214 of one bracket assembly 200 can be inserted into the positioning notch 215 of the other bracket assembly 200. Understandably, during actual assembly, when connecting the two bracket assemblies 200, it is only necessary to ensure that the positioning post 214 of one bracket assembly 200 can be inserted into the positioning notch 215 of the other bracket assembly 200 for proper positioning and installation. Then, the voice coil 300, diaphragm assembly 100, and permanent magnet 400 are installed. The positioning and installation via the positioning post 214 and positioning notch 215 ensure the stability of the two bracket assemblies 200 and the precise installation of the voice coil 300, diaphragm assembly 100, and permanent magnet 400. Alternatively, each bracket assembly 200 may be provided with two positioning posts 214 and two positioning notches 215, with the two positioning posts 214 arranged diagonally. This can further improve the docking accuracy of the two bracket assemblies 200.

[0034] refer to Figure 7 As shown, the voice coil 300 includes a multi-layer circuit board 310, and the number of layers in the circuit board 310 is even. Each layer of the circuit board 310 has a ring-shaped ribbon cable 312. Connecting bars 311 are provided on both the inner and outer sides of the ring-shaped ribbon cable 312. The ring-shaped ribbon cables 312 on adjacent circuit boards 310 are electrically connected through the connecting bars 311. The outer connecting bar 311 of the topmost ring-shaped ribbon cable 312 is electrically connected to a wire. The two inner connecting bars 311 of two adjacent ring-shaped ribbon cables (312) are electrically connected. The two inner connecting bars 311 of two adjacent ring-shaped ribbon cables 312 are electrically connected. The outer connecting bar 311 of the bottommost ring-shaped ribbon cable 312 is electrically connected to a wire. It can be understood that by using a multi-layer circuit board 310 assembly instead of the traditional wire winding method, the voice coil 300 simplifies its manufacturing and assembly, thereby simplifying the overall speaker structure and reducing the speaker's manufacturing cost. Furthermore, in this embodiment, the voice coil 300 ensures that the circuit cuts the magnetic field lines, thereby ensuring the uniformity of stress on the annular ribbon cable 312 on the voice coil 300. Optionally, the annular ribbon cable 312 is made of copper wire.

[0035] The voice coil 300 in this embodiment includes a six-layer circuit board 310, as shown in the reference. Figure 7As shown, from top to bottom, the circuit boards are: sixth layer 310, fifth layer 310, fourth layer 310, third layer 310, second layer 310, and first layer 310. During actual assembly, the connecting pin 311 inside the ring cable 312 of the sixth layer 310 is connected to the wire, allowing current to flow. The connecting pin 311 outside the ring cable 312 of the sixth layer 310 is connected to the connecting pin 311 outside the ring cable 312 of the fifth layer 310. The connecting pin 311 inside the ring cable 312 of the fifth layer 310 is connected to the connecting pin 311 inside the ring cable 312 of the fourth layer 310. The fourth layer circuit board 310 is connected to the connecting bar 311 outside the ring cable 312. The connecting bar 311 of the third layer circuit board 310 is connected to the connecting bar 311 outside the ring cable 312. The connecting bar 311 of the third layer circuit board 310 is connected to the connecting bar 311 inside the ring cable 312. The connecting bar 311 of the second layer circuit board 310 is connected to the connecting bar 311 outside the ring cable 312. The connecting bar 311 of the second layer circuit board 310 is connected to the connecting bar 311 outside the ring cable 312. The connecting bar 311 of the first layer circuit board 310 is connected to the connecting bar 311 inside the ring cable 312 and is connected to the wire, allowing current to flow in.

[0036] Of course, in other embodiments of the present invention, the number of layers of the circuit board 310 may be two, four, eight or even more, and the number of layers of the circuit board 310 may be adjusted according to actual needs.

[0037] refer to Figure 8 As shown, the present invention also discloses a sound-generating device, which includes a housing 10 and the aforementioned co-directional vibrating back-to-back loudspeakers. The housing 10 has a first sound outlet 11 and a second sound outlet 12 respectively disposed on two opposite sides along a third direction. The first sound outlet 11 and the second sound outlet 12 are staggered along a first direction. The housing 10 and the co-directional vibrating back-to-back loudspeakers define a first sound outlet channel 13 and a second sound outlet channel 14. The first sound outlet channel 13 communicates with the first sound outlet 11, and the second sound outlet channel 14 communicates with the second sound outlet 12. It can be understood that because the sound-generating device has the aforementioned co-directional vibrating back-to-back loudspeakers, and the housing 10 has the first sound outlet 11 and the second sound outlet 12 respectively disposed on two opposite sides along a third direction, the radiation from the vibration of the two diaphragm assemblies 100 can be maximized, thereby resulting in better acoustic performance and sound effects for the sound-generating device.

[0038] The sound-generating device disclosed in this invention can be smart glasses, smartwatches, or headphones, and of course, it can also be other sound-generating devices.

[0039] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. 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.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A back-to-back loudspeaker that vibrates in the same direction, characterized in that, include: Two diaphragm assemblies (100) are spaced apart along a first direction. Each diaphragm assembly (100) is provided with a first mounting groove (111) extending along a second direction. Each diaphragm assembly (100) is provided with a protrusion (121) protruding toward each other. Two support assemblies (200) are connected to the diaphragm assembly (100), and the two support assemblies (200) are respectively located on the side of the two diaphragm assemblies (100) facing each other. Each support assembly (200) has a second mounting groove (201) corresponding to the first mounting groove (111). A voice coil (300) passes through the second mounting groove (201) on both sides along the first direction and is sealed to the first mounting groove (111); Two permanent magnets (400) are located on both sides of the voice coil (300) along a third direction. Each permanent magnet (400) is connected to two support assemblies (200) on both sides along a first direction. The magnetic poles of the permanent magnets (400) are located at both ends of the permanent magnets (400) in the first direction, and the magnetic poles of the two permanent magnets (400) are arranged in opposite directions. An inner cavity sound outlet (101) is formed between the end of each permanent magnet (400) along a second direction and the two support assemblies (200). The first direction, the second direction, and the third direction are set perpendicularly to each other.

2. The back-to-back loudspeaker with co-directional vibration according to claim 1, characterized in that, The voice coil (300) includes a multi-layer circuit board (310), and the number of layers of the circuit board (310) is even. Each layer of the circuit board (310) has a ring-shaped ribbon cable (312). The inner and outer sides of the ring-shaped ribbon cable (312) are provided with connecting bars (311). The ring-shaped ribbon cables (312) on two adjacent circuit boards (310) are electrically connected through the connecting bars (311); wherein: The outermost connecting bar (311) of the topmost ring cable (312) is electrically connected to the conductor. The two inner connecting bars (311) of two adjacent ring cables (312) are electrically connected. The outermost connecting bar (311) of the bottommost ring cable (312) is electrically connected to the conductor.

3. The back-to-back loudspeaker with co-directional vibration according to claim 1, characterized in that, The support assembly (200) includes a basin stand (210) and a top plate (220). The basin stand (210) is provided with a fixing groove (211), and the top plate (220) is fixed in the fixing groove (211).

4. The back-to-back loudspeaker with co-directional vibration according to claim 3, characterized in that, A positioning protrusion (221) is provided on one of the groove wall of the fixing groove (211) and the outer peripheral wall of the top plate (220), and a positioning groove (212) is provided on the other of the groove wall of the fixing groove (211) and the outer peripheral wall of the top plate (220). The positioning protrusion (221) can be fitted into the positioning groove (212).

5. The back-to-back loudspeaker with co-directional vibration according to claim 4, characterized in that, There are multiple positioning protrusions (221) and positioning grooves (212), and multiple positioning grooves (212) or multiple positioning protrusions (221) are provided on both sides of the top plate (220) along the third direction.

6. The back-to-back loudspeaker with co-directional vibration according to claim 5, characterized in that, The second mounting slot (201) includes a first slot body (2011) and a second slot body (2012). The first slot body (2011) is disposed on the basin frame (210). In the direction close to the permanent magnet (400), the cross-section of the first slot body (2011) gradually decreases. The second slot body (2012) is disposed on the top plate (220). The second slot body (2012) includes a straight section and a gradually expanding section connected to both ends of the straight section. The large end of the gradually expanding section is connected to the straight section.

7. The back-to-back loudspeaker with co-directional vibration according to claim 1, characterized in that, Each of the bracket assemblies (200) has a half hole (213) at both ends along the second direction, and the two half holes (213) are located on both sides of the second mounting groove (201); the half holes (213) on the two bracket assemblies (200) are spliced ​​together to form a lead wire hole, and at least one of the two lead wire holes is fitted with a wire of the voice coil (300).

8. The back-to-back loudspeaker with co-directional vibration according to claim 1, characterized in that, The bracket assembly (200) is further provided with a positioning post (214) and a positioning notch (215), the positioning post (214) and the positioning notch (215) being located on one side of the second mounting groove (201) along the second direction, wherein: In the two bracket assemblies (200), the positioning post (214) of one bracket assembly (200) can be inserted into the positioning notch (215) of the other bracket assembly (200).

9. The back-to-back loudspeaker with co-directional vibration according to claim 1, characterized in that, The diaphragm assembly (100) includes a centering plate (110) and a diaphragm (120). A first mounting groove (111) is provided on the centering plate (110), and a third mounting groove (122) corresponding to the first mounting groove (111) is provided on the diaphragm (120). The centering plate (110) is mounted on the diaphragm (120). The outer edge of the diaphragm (120) is connected to the support assembly (200) through a copper ring (130). A protrusion (121) is provided on the diaphragm (120) and surrounds the centering plate (110). The voice coil (300) is filled with sealant (500) between its two ends along the first direction and the first mounting groove (111) on the centering plate (110) to fix the voice coil (300) on the centering plate (110).

10. A sound-generating device, characterized in that, The device includes a housing (10) and a back-to-back loudspeaker that vibrates in the same direction as described in any one of claims 1-9. The housing (10) has a first sound outlet (11) and a second sound outlet (12) respectively provided on two sides that are opposite to each other along a third direction. The first sound outlet (11) and the second sound outlet (12) are staggered along a first direction. The housing (10) and the back-to-back loudspeaker that vibrates in the same direction define a first sound outlet channel (13) and a second sound outlet channel (14). The first sound outlet channel (13) is connected to the first sound outlet (11), and the second sound outlet channel (14) is connected to the second sound outlet (12).

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