Vibration sound production device and electronic equipment

Abstract

The invention discloses a vibration sound production device and electronic equipment, and relates to the technical field of electroacoustic transduction, and a first vibration system and a second vibration system of the vibration sound production device are located at two sides of a magnetic circuit system along a first direction. A common magnetic part, two side magnetic parts and two central magnetic parts of the magnetic circuit system extend along a second direction perpendicular to the first direction, the first vibration system vibrates along the first direction, two voice coils of the first vibration system are arranged in parallel and are connected with the diaphragm assembly, and the second vibration system vibrates along a third direction perpendicular to the first direction and the second direction and is connected with the diaphragm assembly. The long sides of two driving coils of the second vibration system are arranged corresponding to the common magnetic part and the central magnetic part; wherein the width of the common magnetic part along the third direction is greater than or equal to 1.2 times of the width of the central magnetic part along the third direction. According to the vibration sound production device, the loudspeaker and the motor are integrated, so that the integration level is improved, and the occupied space in electronic equipment is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic transduction, and in particular to a vibration sound generating device and an electronic device using the same. BACKGROUND

[0002] With the development of electronic technology, portable consumer electronic devices are increasingly popular, such as smart phones, handheld game consoles, tablet computers, etc. These electronic devices generally interact with users through sound playing and / or vibration feedback.

[0003] At present, electronic devices, especially mobile phone products, usually need to have both audio experience and vibration haptic experience functions. The audio experience comes from a loudspeaker device, and the vibration experience comes from a motor device, which improves the user's audio and vibration haptic experience. In the related art, the electronic device usually separately sets the loudspeaker device and the motor device, which leads to a large space occupation in the smart terminal device, is not conducive to the assembly of the electronic device, and has an undesirable layout effect, thereby affecting the user experience of the smart terminal. SUMMARY

[0004] The main purpose of the present application is to provide a vibration sound generating device and an electronic device, which aims to provide a vibration sound generating device integrating a loudspeaker and a motor, thereby improving the integration of the vibration sound generating device, saving the space occupation of the vibration sound generating device in the electronic device, increasing the volume of the magnet, improving the performance, and reducing the product thickness.

[0005] To achieve the above purpose, the present application provides a vibration sound generating device, which comprises a magnetic circuit system, a first vibration system and a second vibration system, the first vibration system and the second vibration system being located on both sides of the magnetic circuit system along a first direction; The magnetic circuit system comprises a magnetic conducting plate and a common magnetic part, two edge magnetic parts and two center magnetic parts arranged on the magnetic conducting plate, the common magnetic part, the two edge magnetic parts and the two center magnetic parts all extending along a second direction perpendicular to the first direction, the two center magnetic parts being located between the two edge magnetic parts, and the common magnetic part being located between the two center magnetic parts, so that each center magnetic part is spaced apart from the common magnetic part and an edge magnetic part to form a magnetic gap; The first vibration system vibrates along the first direction, and comprises a diaphragm assembly and two voice coils connected to the diaphragm assembly, the two voice coils being arranged in parallel, the two voice coils each being a ring-shaped voice coil formed by winding wires, each voice coil having a height along the first direction, the height being greater than or equal to the thickness between the inner wall surface and the outer wall surface of the voice coil, and each voice coil being arranged corresponding to a magnetic gap; The second vibration system vibrates along a third direction perpendicular to the first direction and the second direction, the second vibration system comprises two drive coils, each of the drive coils has two long sides extending along the second direction, adjacent long sides of the two drive coils are arranged corresponding to the common magnetic part, and the other long side is arranged corresponding to the center magnetic part; The width of the common magnetic part along the third direction is greater than or equal to 1.2 times the width of the center magnetic part along the third direction.

[0006] In an embodiment, the common magnetic part comprises a common magnet and a common magnetic conductive plate arranged in layers, and the common magnet is connected to the magnetic conductive plate. Each of the edge magnetic parts comprises an edge magnet and an edge magnetic conductive plate arranged in layers, and the edge magnet is connected to the magnetic conductive plate. Each of the center magnetic parts comprises a center magnet and a center magnetic conductive plate arranged in layers, and the center magnet is connected to the magnetic conductive plate. The common magnet, the two edge magnets and the two center magnets are magnetized along the first direction, the magnetization directions of the two center magnets are opposite to those of the common magnet and the two edge magnets, and the current directions in the adjacent long sides of the two drive coils are the same.

[0007] In an embodiment, the magnetic conductive plate is provided with an opening corresponding to the common magnetic part and the two center magnetic parts, and parts of the common magnetic part and the two center magnetic parts are arranged in the opening and arranged corresponding to the long sides of the two drive coils. The opening is one; or the opening comprises three, the adjacent openings form a rib, and the common magnetic part and the two center magnetic parts correspond to the three openings one by one.

[0008] In an embodiment, the common magnetic part and the two center magnetic parts each comprise a main body part on the side of the magnetic conductive plate facing the diaphragm assembly and a protruding part extending towards the opening. The side of the protruding part facing the drive coil is flush with the side of the magnetic conductive plate facing the drive coil.

[0009] In an embodiment, the second vibration system further comprises a counterweight provided with a mounting hole, and at least part of the two drive coils is arranged in the mounting hole.

[0010] In an embodiment, the second vibration system further comprises a mounting plate corresponding to the mounting hole, the mounting plate is connected to the counterweight and located on the side of the two drive coils away from the magnetic circuit system, and the two drive coils are arranged on the mounting plate. The mounting plate is welded or bonded with the counterweight; and / or the mounting plate is a magnetic conducting plate; and / or the two driving coils have wire ends at one end along the second direction, and the wire ends protrude from the end of the mounting plate along the second direction.

[0011] In an embodiment, the counterweight has bending parts extending towards the first vibration system at both ends along the third direction, so that the counterweight forms a containing space, and at least part of the magnetic circuit system is contained in the containing space and located between the two bending parts.

[0012] In an embodiment, each of the bending parts has a buffer on the side facing the containing space, and the buffer is located between the magnetic circuit system and the bending part. And / or the counterweight has limiting notches at both sides along the second direction, and the vibration sound production device has limiting protrusions corresponding to each of the limiting notches, and the length of each of the limiting notches along the third direction is greater than the length of each of the limiting protrusions along the third direction.

[0013] In an embodiment, the vibration sound production device further comprises a shell, and the second vibration system further comprises bending elastic sheets, one end of each of the bending elastic sheets is connected with the counterweight, and the other end of each of the bending elastic sheets is connected with the shell, so that the second vibration system is suspended in the shell. The bending elastic sheets comprise two, and the two bending elastic sheets are located at both sides of the counterweight along the third direction.

[0014] The present application further provides an electronic device comprising the vibration sound production device.

[0015] The vibration-generating device of this invention integrates a first vibration system and a second vibration system on opposite sides of a magnetic circuit system along a first direction. The first vibration system and the magnetic circuit system cooperate to form a speaker structure, and the magnetic circuit system and the second vibration system cooperate to form a motor structure. This integrates the speaker structure and the motor structure into a single unit, effectively improving the integration of the vibration-generating device, saving space in electronic devices, and allowing the speaker structure and motor structure to share a single magnetic circuit system. This effectively reduces the height of the vibration-generating device in the Z-direction, further saving space in electronic devices. Simultaneously, through… The magnetic circuit system is configured as a magnetic guide plate and a common magnetic part, two side magnetic parts, and two central magnetic parts located on the magnetic guide plate. The two central magnetic parts are positioned between the two side magnetic parts, and the common magnetic part is positioned between the two central magnetic parts. Each central magnetic part is spaced apart from the common magnetic part and one side magnetic part to form a magnetic gap. The first vibration system is configured as a diaphragm assembly and two voice coils connected to the diaphragm assembly. The two voice coils are arranged in parallel, with each voice coil corresponding to a magnetic gap. This dual voice coil structure drives the diaphragm assembly to vibrate in a first direction to produce sound, thus realizing the sound production function of the speaker structure. This design increases the magnet volume through the multi-magnetic-part design of the magnetic circuit system. In conjunction with a dual voice coil structure, the acoustic performance of the speaker structure is effectively improved. This structure also allows the first vibration system to effectively reduce its height in the Z-direction, further reducing the height of the vibration-generating device in the Z-direction. Furthermore, the two drive coils of the second vibration system are arranged in parallel along a third direction, with each coil corresponding to both the common magnetic part and the central magnetic part. That is, adjacent long sides of the two drive coils correspond to the common magnetic part, and the other long side corresponds to the central magnetic part. Under the action of the magnetic circuit system, the two drive coils drive the second vibration system to vibrate along a third direction, thus realizing the vibration function of the motor structure. The vibration-generating device's... The sound device and motor structures can operate independently without interfering with each other, enabling the vibration sound-generating device to provide both audio and tactile vibration experiences, thus enhancing the user experience. Furthermore, by setting the width of the common magnetic part along the third direction to be greater than or equal to 1.2 times the width of the central magnetic part along the third direction, it is ensured that the common magnetic part cooperates with the two central magnetic parts to drive the two drive coils to vibrate along the third direction. Moreover, by setting the height of the voice coil along the first direction to be greater than or equal to the thickness of the voice coil, it is less affected by changes in the magnetic field when the vibration amplitude is relatively large, resulting in a significantly flatter BL(x) curve, which significantly reduces the distortion of the vibration sound-generating device and improves the sound quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a structure of an embodiment of the vibration sound-generating device provided by the present invention; Figure 2 A schematic diagram of the structure of another embodiment of the vibration sound-generating device provided by the present invention; Figure 3 This is a partially exploded schematic diagram of an embodiment of the vibration sound-generating device provided by the present invention. Figure 4 A cross-sectional view along a third direction in one embodiment of the vibration sound-generating device provided by the present invention; Figure 5 A cross-sectional view along the second direction in one embodiment of the vibration sound-generating device provided by the present invention; Figure 6 A top view of one embodiment of the vibration sound-generating device provided by the present invention, with the first housing removed; Figure 7 A top view of one embodiment of the vibration sound-generating device provided by the present invention, with the second housing removed; Figure 8 A cross-sectional schematic diagram of the connection between the first vibration system and the magnetic circuit system in one embodiment of the vibration sound-generating device provided by the present invention; Figure 9 A top view of the connection between the first vibration system and the magnetic circuit system in one embodiment of the vibration sound-generating device provided by the present invention; Figure 10 A partial top view of the connection between the first vibration system and the magnetic circuit system in one embodiment of the vibration sound-generating device provided by the present invention; Figure 11 This is a schematic diagram of the structure of an embodiment of the magnetic circuit system provided by the present invention; Figure 12 This is an exploded view of an embodiment of the magnetic circuit system provided by the present invention; Figure 13 This is a schematic diagram of a structure of an embodiment of the second vibration system provided by the present invention.

[0018] Reference numerals: 100, Vibration sound-generating device; 1, Outer shell; 11, First shell; 111, Top plate; 1111, Adhesive-gripping hole; 112, Support part; 1123, Sound-emitting part; 12, Second shell; 121, Bottom plate; 122, Side wall; 123, Receiving cavity; 124, Limiting protrusion; 2, Magnetic circuit system; 21, Magnetic guide plate; 211, Opening; 212, Rib; 22, Common magnetic part; 221, Main body; 222, Protrusion; 223, Common magnet; 224, Common magnetic guide plate; 23, Side magnetic part; 231, Side magnet; 232, Side magnetic guide plate; 24, Central magnetic part; 241, Central magnet. ; 242, Central magnetic guide plate; 25, Magnetic gap; 3, First vibration system; 31, Diaphragm assembly; 311, Diaphragm; 312, Reinforcing member; 3121, Connecting protrusion; 32, Voice coil; 33, Centering support; 331, External fixing part; 332, Internal fixing part; 333, Spring arm part; 334, Solder pad part; 4, Second vibration system; 41, Counterweight; 411, Mounting hole; 412, Bending part; 413, Accommodating space; 414, Buffer; 415, Limiting notch; 416, Mounting step; 42, Drive coil; Long side; 422, Wire end; 43, Mounting plate; 44, Bending spring; 5, Mounting ring.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0023] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0024] This invention proposes a vibration-generating sound device 100. It is understood that the vibration-generating sound device 100 can be applied to electronic devices, such as mobile phones, wearable devices, etc., and is not limited thereto.

[0025] In this embodiment, the vibration sound-generating device 100 integrates the speaker structure and the vibration motor structure into one unit, with the speaker structure and vibration motor structure sharing a single magnetic circuit system. This results in the integrated product's spatial dimensions being significantly smaller than the combined volume of the two components. It is understood that the vibration sound-generating device 100 couples the functions of the speaker structure and the vibration motor structure, enabling both the speaker structure's sound-generating function and the motor structure's vibration function.

[0026] Please refer to the reference. Figures 1 to 13As shown, in this embodiment of the invention, the vibration sound-generating device 100 includes a magnetic circuit system 2, a first vibration system 3, and a second vibration system 4. The first vibration system 3 and the second vibration system 4 are located on both sides of the magnetic circuit system 2 along a first direction. The magnetic circuit system 2 includes a magnetic guide plate 21 and a common magnetic part 22, two side magnetic parts 23, and two central magnetic parts 24 disposed on the magnetic guide plate 21. The common magnetic part 22, the two side magnetic parts 23, and the two central magnetic parts 24 all extend along a second direction perpendicular to the first direction. The two central magnetic parts 24 are located between the two side magnetic parts 23, and the common magnetic part 22 is located between the two central magnetic parts 24, so that each central magnetic part 24 is spaced apart from the common magnetic part 22 and the side magnetic part 23 to form a magnetic gap 25. The first vibration system 3 vibrates along the first direction and includes a diaphragm assembly 31 and a connecting... Two voice coils 32 are connected to the diaphragm assembly 31 and are arranged in parallel. Both voice coils 32 are annular voice coils formed by winding wire. Each voice coil 32 has a height along the first direction, which is greater than or equal to the thickness between the inner and outer wall surfaces of the voice coil 32. Each voice coil 32 is correspondingly arranged with a magnetic gap 25. The second vibration system 4 vibrates along a third direction perpendicular to the first and second directions. The second vibration system 4 includes two drive coils 42. Each drive coil 42 has two long sides 421 extending along the second direction. The adjacent long sides 421 of the two drive coils 42 are correspondingly arranged with a common magnetic part 22, and the other long side 421 is correspondingly arranged with a central magnetic part 24. The width of the common magnetic part 22 along the third direction is greater than or equal to 1.2 times the width of the central magnetic part 24 along the third direction.

[0027] In this embodiment, as Figures 3 to 5 As shown, the magnetic circuit system 2 has a first side and a second side that are opposite to each other along a first direction. The first vibration system 3 and the second vibration system 4 are respectively disposed on both sides of the magnetic circuit system 2 along the first direction. That is, the first vibration system 3 is located on the first side of the magnetic circuit system 2, opposite to and spaced from the magnetic circuit system 2, to form a speaker structure. The second vibration system 4 is located on the second side of the magnetic circuit system 2, opposite to and spaced from the magnetic circuit system 2, to form a motor structure. In this way, the speaker structure and the motor structure are integrated into one unit, and the speaker structure and the motor structure share a single magnetic circuit system. This allows the vibration sound-generating device 100 to realize both the sound-generating function of the speaker structure and the vibration function of the motor structure. Moreover, the spatial size of the integrated product is much smaller than the combined volume of the two, thereby effectively reducing the size of the vibration sound-generating device 100.

[0028] Understandably, the magnetic circuit system 2, the first vibration system 3, and the second vibration system 4 of the vibration sound generating device 100 can be integrated into one unit through the housing 1, that is, the housing 1 provides an installation base for components such as the magnetic circuit system 2, the first vibration system 3, and the second vibration system 4.

[0029] In one embodiment, to facilitate the installation and protection of components such as the magnetic circuit system 2, the first vibration system 3, and the second vibration system 4, the outer casing 1 has a mounting cavity, and the components such as the magnetic circuit system 2, the first vibration system 3, and the second vibration system 4 are all disposed within the mounting cavity of the outer casing 1. Optionally, the structure of the outer casing 1 can be a mounting shell, a box, or a housing with a mounting cavity.

[0030] It should be noted that the outer shell 1 can be a one-piece structure or a separate structure. In this embodiment, as shown... Figures 1 to 7 As shown, the outer shell 1 includes a first shell 11 and a second shell 12, that is, the outer shell 1 is a separate structure, which is formed by connecting the first shell 11 and the second shell 12 to form an integral structure. Of course, in other embodiments, the outer shell 1 can also be formed by integral molding, which is not limited here.

[0031] Optionally, both the first housing 11 and the second housing 12 of the outer casing 1 are metal parts, and the first housing 11 and the second housing 12 are sealed together to define the mounting cavity. That is, the first housing 11 and the second housing 12 are made of metal, so that the overall structure of the outer casing 1 is made of metal. In this embodiment, the first housing 11 connects the fixed magnetic circuit system 2 and the first vibration system 3, and the second vibration system 4 is suspended and connected to the second housing 12, which is not limited here.

[0032] Understandably, the first shell 11 and the second shell 12 of the outer casing 1 can be made of thinner steel sheets, allowing the outer casing 1 to be designed to be thinner. This greatly increases the volume of the cavity inside the outer casing 1, effectively increasing the acoustic cavity volume of the speaker structure formed by the magnetic circuit system 2 and the first vibration system 3, thereby improving the acoustic performance of the vibration sound-generating device 100. Simultaneously, the first vibration system 3 is fixed inside the outer casing 1, allowing heat dissipation through the metal outer casing 1, thus improving the heat dissipation performance of the vibration sound-generating device 100.

[0033] Of course, in other embodiments, the outer shell 1 may have other forms. The outer shell 1 may be a bracket disposed on the side of the magnetic circuit system 2 facing away from the first vibration system 3, with the second vibration system 4 suspended and connected to the bracket, opposite to and spaced from the magnetic circuit system 2. In this case, the magnetic circuit system 2 and the first vibration system 3 of the vibration sound generating device 100 are disposed on the outside of the outer shell 1, and the magnetic circuit system 2 and the first vibration system 3 are connected by a mounting ring 5, thus achieving the connection and fixation of the first vibration system 3, the magnetic circuit system 2, and the second vibration system 4. Further, the outer shell 1 may be a structure with a receiving space having one or both ends open, and its form can be flexibly adjusted according to actual applications. At the same time, the mounting ring 5 may be integrally disposed with the magnetic circuit system 2 or separately disposed, which is not limited here, but is only named for the convenience of illustrating the relative positional relationship between the first vibration system 3 and the magnetic circuit system 2.

[0034] In this embodiment, as Figure 4 , Figure 5 , Figures 8 to 12 As shown, the magnetic circuit system 2 is configured as a magnetic guide plate 21 and a common magnetic part 22, two side magnetic parts 23, and two central magnetic parts 24 disposed on the magnetic guide plate 21, such that the common magnetic part 22, the two side magnetic parts 23, and the two central magnetic parts 24 all extend along the second direction. Thus, the two central magnetic parts 24 are located between the two side magnetic parts 23, and the common magnetic part 22 is located between the two central magnetic parts 24. That is, one side magnetic part 23, one central magnetic part 24, the common magnetic part 22, another central magnetic part 24, and another side magnetic part 23 are arranged at intervals along the third direction, such that each central magnetic part 24 is spaced apart from the common magnetic part 22 and the side magnetic part 23 to form a magnetic gap 25. Thus, the magnetic circuit system 2 forms two magnetic gaps 25 arranged along the third direction, and the first vibration system 3 is set as a diaphragm assembly 31 and two voice coils 32 connected to the diaphragm assembly 31, so that the two voice coils 32 are arranged in parallel along the third direction, and each voice coil 32 is correspondingly set with a magnetic gap 25. When current is passed through the voice coil 32, the voice coil 32 introduces the current into the magnetic field generated by the magnetic circuit system 2 in the magnetic gap 25, thereby realizing the conversion of current into mechanical energy, so that the two voice coils 32 drive the diaphragm assembly 31 to vibrate and produce sound in the first direction, so as to realize the sound production function of the speaker structure formed by the cooperation of the magnetic circuit system 2 and the first vibration system 3.

[0035] Understandably, the loudspeaker structure formed by the magnetic circuit system 2 and the first vibration system 3 uses a double voice coil structure to drive the diaphragm assembly 31 to vibrate and produce sound in the first direction, thereby realizing the sound production function of the loudspeaker structure. The design of the multi-magnetic part of the magnetic circuit system 2 can increase the volume of the magnet and, together with the double voice coil structure, effectively improve the acoustic performance of the loudspeaker structure. At the same time, the first vibration system 3 can effectively reduce the height in the Z direction by using the double voice coil structure, thereby further reducing the height of the vibration sound-producing device 100 in the Z direction.

[0036] At the same time, such as Figures 3 to 5 , Figure 7 , Figure 13 As shown, by arranging the two drive coils 42 of the second vibration system 4 in parallel along a third direction, and each drive coil 42 having two long sides 421 extending along a second direction, adjacent long sides 421 of the two drive coils 42 are arranged corresponding to the common magnetic part 22, and the other long side 421 is arranged corresponding to the central magnetic part 24. When current is passed through the two drive coils 42, the two drive coils 42 vibrate in the magnetic field formed by the common magnetic part 22 and the central magnetic part 24 of the magnetic circuit system 2, causing the second vibration system 4 to vibrate along the third direction, thereby realizing the vibration function of the motor structure formed by the cooperation of the magnetic circuit system 2 and the second vibration system 4.

[0037] Understandably, by placing the first vibration system 3 and the second vibration system 4 on both sides of the magnetic circuit system 2 along the first direction, the vibration sound generating device 100 can achieve the stacking of the speaker structure and the motor structure in the first direction, thus combining the two functions of vibration experience and audio experience into one. It also allows the speaker structure and the motor structure to share a single magnetic circuit system 2, increasing the magnet volume of the magnetic circuit system 2 and improving the performance of the speaker structure and the motor structure. Furthermore, it can reduce the height or thickness of the vibration sound generating device 100 in the Z direction (i.e., the first direction), thereby enabling the vibration sound generating device 100 to have both audio experience and vibration experience functions.

[0038] It should be noted that, as Figures 1 to 13 As shown, the first vibration system 3 vibrates along the first direction, the second vibration system 4 vibrates along the third direction, and the common magnetic part 22, the two side magnetic parts 23 and the two central magnetic parts 24 of the magnetic circuit system 2 all extend along the second direction and are arranged at intervals along the third direction. The first direction, the second direction and the third direction are arranged perpendicularly to each other.

[0039] Understandably, the speaker structure formed by the magnetic circuit system 2 and the first vibration system 3 can be a single sound-producing unit to achieve sound generation, thus enabling the vibration sound-producing device 100 to also provide an audio experience function. The motor structure formed by the magnetic circuit system 2 and the second vibration system 4 vibrates along a third direction, enabling the vibration sound-producing device 100 to also provide a vibration experience function. In this embodiment, the first vibration system 3 and the second vibration system 4 can operate independently without interfering with each other.

[0040] In one embodiment, the vibration sound-generating device 100 further includes a mounting ring 5, one end of which is connected to the side magnetic part 23 of the magnetic circuit system 2, and the other end of which is connected to the outer periphery of the diaphragm assembly 31.

[0041] In this embodiment, as Figures 3 to 5 , Figures 8 to 10 As shown, a mounting ring 5 is provided between the magnetic circuit system 2 and the diaphragm assembly 31, thereby enabling the installation and fixation of the magnetic circuit system 2 and the first vibration system 3. It is understood that the mounting ring 5 can be a plastic or metal part. The mounting ring 5 and the side magnetic plate 232 of the side magnetic part 23 of the magnetic circuit system 2 can be a separate connection structure, for example, the mounting ring 5 and the side magnetic plate 232 of the side magnetic part 23 can be bonded together. Of course, the mounting ring 5 and the side magnetic plate 232 of the side magnetic part 23 of the magnetic circuit system 2 can also be an integrally molded structure, for example, the mounting ring 5 and the side magnetic plate 232 of the side magnetic part 23 can be integrally injection molded or integrally stretched, etc., which is not limited here.

[0042] In one embodiment, the two voice coils 32 of the first vibration system 3 are arranged in parallel. Both voice coils 32 are annular voice coils formed by winding wires. Each voice coil 32 has a height along a first direction, and the height is greater than or equal to the thickness between the inner and outer wall surfaces of the voice coil 32.

[0043] In this embodiment, as Figure 4 , Figures 8 to 10 As shown, the two voice coils 32 of the first vibration system 3 are arranged in parallel along a third direction. Optionally, both voice coils 32 are annular voice coils formed by winding wire. It can be understood that both voice coils 32 are integral voice coils extending along the first direction, formed by winding the same wire. Each voice coil 32 has a height along the first direction; optionally, the height of each voice coil 32 is greater than or equal to its thickness. It should be noted that the thickness of each voice coil 32 is the distance between the inner and outer walls of the annular voice coil.

[0044] Understandably, since the height of the voice coil 32 is greater than its thickness, it is less affected by changes in the magnetic field during vibration, especially when the vibration amplitude is relatively large. The BL(x) curve is significantly flatter, which significantly reduces the distortion of the vibrating sound-generating device 100 and improves the sound quality.

[0045] In one embodiment, the driving coil 42 includes two coils, both extending along a second direction and arranged in parallel along a third direction. Each driving coil 42 has two long sides 421 extending along the second direction. Adjacent long sides 421 of the two driving coils 42 are respectively arranged corresponding to a common magnetic part 22, and the other long side 421 is respectively arranged corresponding to a central magnetic part 24.

[0046] In this embodiment, as Figures 3 to 5 , Figure 7 , Figure 13 As shown, both drive coils 42 extend along the second direction and are arranged in parallel along the third direction, such that the two long sides 421 of each drive coil 42 correspond to the common magnetic part 22 and a central magnetic part 24, respectively. This arrangement ensures that the magnetic circuit system 2 can provide sufficient magnetic field for the two drive coils 42 to drive the second vibration system 4 to vibrate and move. It should be noted that the number of drive coils 42 can be one or more. Optionally, there may be two drive coils 42.

[0047] Understandably, the two driving coils 42 are the first driving coil and the second driving coil, respectively. The two long sides 421 of the first driving coil are the first long side and the second long side extending along the second direction, respectively, and the two long sides 421 of the second driving coil are the third long side and the fourth long side extending along the second direction, respectively.

[0048] In this embodiment, asFigures 3 to 5 , Figure 7 , Figure 13 As shown, both the first driving coil and the second driving coil extend along the second direction and are arranged in parallel along the third direction, such that the first long side and the second long side of the first driving coil extend along the second direction and are spaced apart and arranged in parallel along the third direction. The third long side and the fourth long side of the second driving coil extend along the second direction and are spaced apart and arranged in parallel along the third direction. This makes the second long side of the first driving coil and the third long side of the second driving coil adjacent to each other, with the first long side located on the side of the second long side facing away from the third long side, and the fourth long side located on the side of the third long side facing away from the second long side.

[0049] Optionally, the second and third long sides are both corresponding to the common magnetic part 22, and the first and fourth long sides are respectively corresponding to the two central magnetic parts 24. This arrangement ensures that the common magnetic part 22 and the two central magnetic parts 24 of the magnetic circuit system 2 correspond to the two drive coils 42, thereby providing sufficient magnetic field for the two drive coils 42 to ensure that the two drive coils 42 drive the second vibration system 4 to vibrate and move.

[0050] In one embodiment, the width of the common magnetic part 22 along the third direction is greater than or equal to 1.2 times the width of the central magnetic part 24 along the third direction.

[0051] In this embodiment, as Figure 4 and Figure 8 As shown, by setting the width of the common magnetic part 22 along the third direction to be greater than the width of the central magnetic part 24 along the third direction, it can be ensured that when the common magnetic part 22 cooperates with the two central magnetic parts 24, it can distribute sufficient magnetic lines of force to each of the two central magnetic parts 24, and the magnetic field strength is maximized when it cooperates with the two central magnetic parts 24.

[0052] Understandably, the width of the common magnetic part 22 along the third direction is defined as d1, and the width of the central magnetic part 24 along the third direction is defined as d2. Optionally, d1 ≥ 1.2 * d2. In this embodiment, the width of the common magnet 223 along the third direction is set to be greater than or equal to 1.2 times the width of the central magnet 241 along the third direction.

[0053] In one embodiment, the common magnetic part 22 includes a common magnet 223 and a common magnetic guide plate 224 stacked together, with the common magnet 223 connected to the magnetic guide plate 21; each side magnetic part 23 includes a side magnet 231 and a side magnetic guide plate 232 stacked together, with the side magnet 231 connected to the magnetic guide plate 21; each central magnetic part 24 includes a central magnet 241 and a central magnetic guide plate 242 stacked together, with the central magnet 241 connected to the magnetic guide plate 21.

[0054] In this embodiment, as Figure 8As shown, the common magnet 223, the two side magnets 231, and the two center magnets 241 are all magnetized along the first direction, and the magnetization direction of the two center magnets 241 is opposite to that of the common magnet 223 and the two side magnets 231. It can be understood that each center magnet 241 forms a magnetic gap 25 with the common magnet 223 and the side magnets 231, and each center magnetic plate 242, each side magnetic plate 232, and the common magnetic plate 224 are stacked with each center magnet 241, each side magnet 231, and the common magnet 223 along the first direction, and are arranged opposite to each other along the third direction. This makes the two voice coils 32 generate a high driving force in the two magnetic gaps 25, driving the diaphragm assembly 31 of the first vibration system 3 to move.

[0055] Understandably, since the short axis region of the voice coil 32 is far from the magnetic field, and the proportion of the short axis region of the voice coil 32 far from the magnetic field is less than 15%, the black-light (BL) loss is controlled within 15%. Furthermore, the long axis of the voice coil 32 is made as close as possible to the central magnet 241, the side magnet 231, and the common magnet 223 to improve the magnetic circuit utilization. It should be noted that a magnetic guide plate 21 can be placed at the bottom of the central magnet 241, the side magnet 231, and the common magnet 223 to further improve BL.

[0056] Optionally, the current direction in adjacent long sides 421 of the two drive coils 42 is the same. In this embodiment, as... Figure 4 As shown, the current direction in the second long side is the same as the current direction in the third long side, so that the second and third long sides are both set to correspond to the common magnetic part 22. The first and fourth long sides are respectively set to correspond to the two central magnetic parts 24. In this way, when the magnetization direction of the two central magnets 241 is opposite to the magnetization direction of the common magnet 223, the two central magnets 241 and the common magnet 223 can cooperate to drive the two drive coils 42 to simultaneously drive the second vibration system 4 to vibrate and move.

[0057] Understandably, the extending directions of the two central magnets 241 and the common magnet 223 are consistent with the extending directions of the first and second long sides of the first driving coil, and the third and fourth long sides of the second driving coil, all extending along the second direction. In this embodiment, the arrangement direction of the two central magnets 24 and the common magnet 22 is the same as the vibration movement direction of the second vibration system 4, and the arrangement direction of the two driving coils 42 is the same as the vibration movement direction of the second vibration system 4.

[0058] In one embodiment, the magnetic plate 21 has an opening 211 corresponding to the common magnetic part 22 and the two central magnetic parts 24. Parts of the common magnetic part 22 and the two central magnetic parts 24 are all disposed in the opening 211 and are disposed corresponding to the long side 421 of the two drive coils 42.

[0059] In this embodiment, asFigure 4 , Figure 5 , Figure 8 , Figure 12 As shown, by providing openings 211 on the magnetic guide plate 21, portions of the common magnetic part 22 and the two central magnetic parts 24 are disposed within the openings 211 and correspondingly arranged with the two drive coils 42. This reduces the distance between the common magnetic part 22 and the two central magnetic parts 24 and the drive coils 42, effectively increasing the magnetic field strength provided by the common magnetic part 22 and the two central magnetic parts 24 to the two drive coils 42, ensuring that the two drive coils 42 drive the second vibration system 4 to vibrate and move. Simultaneously, it also facilitates the thinning of the vibration sound-generating device 100.

[0060] It is understandable that the opening 211 on the magnetic plate 21 can be one or more. When there is only one opening 211, the common magnetic part 22 and the two central magnetic parts 24 are all disposed within one opening 211. This facilitates manufacturing and saves on manufacturing costs. When there are multiple openings 211, optionally, there are three openings 211. In this embodiment, as... Figure 4 , Figure 8 and Figure 12 As shown, ribs 212 are formed between adjacent openings 211. The shared magnetic part 22 and the two central magnetic parts 24 correspond one-to-one with the three openings 211. The ribs 212 can reduce the divergence of magnetic lines of force and make more magnetic lines of force gather in the magnetic field and pass through the voice coil 32 or the drive coil 42.

[0061] In this embodiment, as Figure 4 , Figure 8 and Figure 12 As shown, the magnetic plate 21 has three openings 211, and each opening 211 passes through both sides of the magnetic plate 21 along the first direction. The common magnet 223 of the common magnetic part 22 and the two central magnets 241 of the two central magnetic parts 24 are respectively located in the three openings 211. That is, the end of the common magnet 223 away from the common magnetic plate 224 is located in the opening 211, and the end of the central magnet 241 away from the central magnetic plate 242 is located in the opening 211.

[0062] Optionally, the side of the common magnet 223 facing away from the common magnetic plate 224 is flush with the side of the magnetic plate 21 facing the drive coil 42, and the side of the central magnet 241 facing away from the central magnetic plate 242 is flush with the side of the magnetic plate 21 facing the drive coil 42.

[0063] In this embodiment, as Figure 10 and Figure 12As shown, at least the common magnetic part 22 and the two central magnetic parts 24 are supported at both ends along the second direction on the magnetic guide plate 21. This arrangement improves the connection stability between the common magnetic part 22 and the two central magnetic parts 24 and the magnetic guide plate 21, and allows the middle region of the common magnetic part 22 and the two central magnetic parts 24 to extend into the corresponding opening 211 and be correspondingly arranged with the drive coil 42, thereby providing a magnetic field for the two drive coils 42 of the second vibration system 4.

[0064] Optionally, the width of the opening 211 along the third direction is less than or equal to 1.1 times the width of its corresponding common magnetic part 22 or central magnetic part 24 along the third direction. Specifically, the width of the opening 211 along the third direction can be approximately equal to the width of its corresponding common magnetic part 22 or central magnetic part 24 along the third direction. In this case, the central regions of the common magnetic part 22 or central magnetic part 24 at both ends along the second direction are located within the opening 211 and are basically fitted to the inner wall of the opening 211. Only the two end regions are supported by the magnetic guide plate 21, which can maximize the magnetic field strength. Alternatively, the width of the opening 211 along the third direction can be less than the width of its corresponding common magnetic part 22 or central magnetic part 24 along the third direction. This ensures the structural strength of the magnetic yoke 21 without increasing the magnetic gap width and is also easier to process.

[0065] In one embodiment, the common magnetic part 22 and the two central magnetic parts 24 each include a main body part 221 located on the side of the magnetic guide plate 21 facing the diaphragm assembly 31 and a protrusion 222 extending toward the opening 211; wherein, the side of the protrusion 222 facing the drive coil 42 is flush with the side of the magnetic guide plate 21 facing the drive coil 42.

[0066] In this embodiment, as Figure 4 , Figure 5 , Figure 8 , Figure 10 and Figure 12 As shown, the common magnet 223 of the common magnetic section 22 and the central magnets 241 of the two central magnetic sections 24 each include a main body 221 and a protrusion 222 arranged along the first direction. The main body 221 is supported on the side of the magnetic guide plate 21 facing the diaphragm assembly 31, and the protrusion 222 extends into the opening 211. This arrangement can effectively increase the magnet volume of the common magnet 223 and the two central magnets 241, thereby increasing the magnetic field strength of the magnetic circuit system 2 and improving the vibration performance of the first vibration system 3 and the second vibration system 4.

[0067] Understandably, the two ends of the main body 221 along the second direction are supported on the magnetic plate 21. That is, the two ends of the main body 221 of the common magnet 223 and the two central magnets 241 along the second direction are both supported on the magnetic plate 21. This can improve the connection stability between the common magnet 22 and the two central magnets 24 and the magnetic plate 21.

[0068] Optionally, the sides of the multiple protrusions 222 facing the drive coil 42 are all flush with the side of the magnetic plate 21 facing the drive coil 42. This arrangement allows the common magnet 223 and the two central magnets 241 to be positioned opposite the two drive coils 42 respectively, thereby increasing the magnetic field strength. It also prevents the magnetic circuit system 2 from interfering with the vibration movement of the second vibration system 4 in the third direction.

[0069] To further ensure the structural stability of the magnetic circuit system 2, in one embodiment, the common magnetic part 22 and the two central magnetic parts 24 are integrally hot-pressed with the magnetic guide plate 21.

[0070] In this embodiment, both the common magnet 223 of the common magnetic part 22 and the central magnet 241 of the central magnetic part 24 can be made of neodymium iron boron material. By integrally hot-pressing the common magnet 223 and the two central magnets 241 with the magnetic yoke 21, the outer periphery of the protrusions 222 of the common magnet 223 and the two central magnets 241 fits snugly against the inner wall of the opening 211 of the magnetic yoke 21. This means that the common magnet 223 and the two central magnets 241 achieve "zero-fit" with the magnetic yoke 21, resulting in a near-complete fit at the connection points between the common magnet 223 and the two central magnets 241 and the magnetic yoke 21. This eliminates assembly tolerances and material tolerances, allowing for the realization of a seamless connection between the common magnet 223 and the two central magnets 241. The volume of magnet 241 is maximized, and compared with sintered NdFeB, hot-pressed NdFeB can improve the mechanical strength of the shared magnet 223 and the two central magnets 241, and is not easy to break. This allows the vibration sound-generating device 100 to not only achieve an ultra-thin magnetic circuit design, but also increase the magnet volume of the magnetic circuit system 2, thereby improving the sound-generating performance of the vibration sound-generating device 100. It also makes the structure of the magnetic circuit system 2 more reliable and less prone to breakage. This not only improves the stability of the product's use, but also meets higher performance requirements to compensate for the performance loss after the vibration sound-generating device 100 is made thinner.

[0071] Optionally, the width of each opening 211 along the third direction is less than or equal to 1.1 times the width of its corresponding main body 221 along the third direction, which is not limited here.

[0072] In one embodiment, the second vibration system 4 further includes a counterweight 41, which has a mounting hole 411, and at least a portion of the two drive coils 42 are disposed in the mounting hole 411.

[0073] In this embodiment, asFigures 3 to 7 , Figure 13 As shown, by setting a counterweight 41, the drive coil 42 is installed and fixed, and the weight of the second vibration system 4 is increased. Thus, when the drive coil 42 drives the counterweight 41 to vibrate in the third direction, the vibration of the motor structure is improved.

[0074] Understandably, the counterweight 41 is suspended inside the outer casing 1, and the drive coil 42 is located on the counterweight 41. This allows the drive coil 42 to drive the counterweight 41 to vibrate in a third direction within the outer casing 1 under the action of the magnetic circuit system 2. Specifically, the counterweight 41 is provided with a mounting groove or mounting hole 411.

[0075] In this embodiment, as Figures 3 to 7 , Figure 13 As shown, by providing mounting holes 411 in the counterweight 41, at least part of the drive coil 42 is disposed in the mounting holes 411, which can not only realize the installation of the drive coil 42, but also reduce the stacking volume of the counterweight 41 and the drive coil 42 in the first direction, thereby further reducing the height of the vibration sound generating device 100 in the Z direction.

[0076] In one embodiment, the second vibration system 4 further includes a mounting plate 43 corresponding to the mounting hole 411. The mounting plate 43 is connected to the counterweight 41 and is located on the side of the two drive coils 42 facing away from the magnetic circuit system 2. The two drive coils 42 are disposed on the mounting plate 43.

[0077] In this embodiment, as Figure 4 , Figure 5 , Figure 7 As shown, by setting a mounting plate 43 and placing the drive coil 42 on the mounting plate 43, at least part of the drive coil 42 is placed in the mounting hole 411, and the mounting plate 43 is connected to the counterweight 41. In this way, the drive coil 42 and the counterweight 41 can be connected by the mounting plate 43, thereby improving the installation stability.

[0078] Understandably, both drive coils 42 extend along the second direction and are arranged on the mounting plate 43 along the third direction, so that the two drive coils 42 are located in the mounting holes 411 of the counterweight block 41, that is, the mounting plate 43 is set in accordance with the mounting holes 411 and is located on the side of the drive coils 42 facing away from the magnetic circuit system 2.

[0079] In one embodiment, the counterweight 41 is provided with a mounting step 416 on the side away from the magnetic circuit system 2. The mounting step 416 is provided adjacent to the mounting hole 411. The mounting plate 43 is fixed to the mounting step 416 and corresponds to the mounting hole 411. The drive coil 42 is provided on the mounting plate 43 and is located in the mounting hole 411.

[0080] In this embodiment, as Figure 4, Figure 5 and Figure 7 As shown, by setting an installation step 416 on the counterweight 41, the mounting plate 43 can be connected and fixed using the installation step 416. This allows the drive coil 42 to be connected to the counterweight 41 through the mounting plate 43, and also allows the mounting plate 43 to be positioned and limited using the installation step 416.

[0081] Optionally, the side of the mounting plate 43 facing away from the drive coil 42 is flush with the side of the counterweight facing away from the magnetic circuit system 2. This arrangement ensures that the side of the second vibration system 4 facing away from the magnetic circuit system 2 is a plane, preventing interference with other components when the second vibration system 4 vibrates in a third direction.

[0082] In this embodiment, the mounting plate 43 and the counterweight 41 are welded together. This arrangement improves the connection strength and enhances the drop resistance of the vibration sound-generating device 100. Of course, in other embodiments, the mounting plate 43 and the counterweight 41 can also be bonded together, which is not limited here.

[0083] Optionally, the mounting plate 43 is a magnetic plate. In this way, the magnetic guiding and focusing properties of the mounting plate 43 can be used to form a magnetic circuit through the two drive coils 42 with the common magnetic part 22 of the magnetic circuit system 2 and the two central magnetic parts 24 respectively, thereby ensuring that sufficient magnetic field strength is provided for the two drive coils 42.

[0084] In one embodiment, one end of the two drive coils 42 along the second direction is a wire end 422, which protrudes from the end of the mounting plate 43 along the second direction.

[0085] In this embodiment, as Figure 7 As shown, the lead wire 422 of the drive coil 42 is used to connect and conduct with an external circuit, thus allowing current to flow into the drive coil 42. This arrangement not only enables the drive coil 42 to be installed and fixed, but also avoids interference between the mounting plate 43 and the leads of the drive coil 42.

[0086] In one embodiment, the vibration sound-generating device 100 further includes a housing 1, and the second vibration system 4 further includes a bent spring 44, one end of which is connected to a counterweight 41, and the other end of which is connected to the housing 1, so that the second vibration system 4 is suspended inside the housing 1. The housing 1 can be any of the forms described above.

[0087] In this embodiment, as Figures 3 to 7 , Figure 13As shown, the counterweight 41 is suspended in the mounting cavity of the outer shell 1 by using a bent spring 44. That is, one end of the bent spring 44 is connected to the counterweight 41, and the other end of the bent spring 44 is connected to the cavity wall of the outer shell 1. In this way, when the drive coil 42 drives the counterweight 41 to vibrate synchronously in a third direction, the bent spring 44 provides a support mounting base for the counterweight 41, and also provides elastic buffering force to prevent the counterweight 41 from vibrating too much and damaging other components of the vibration sound generating device 100.

[0088] It is understood that the bending spring 44 can be a component with elastic extension function, such as a spring, a sheet, or other elastic component, and is not limited here. In this embodiment, the bending spring 44 is connected to the outer peripheral wall of the counterweight 41. The bending spring 44 can be a single integral structure or multiple separate structures, and is not limited here.

[0089] Optionally, two bending springs 44 are included. In this embodiment, two bending springs 44 are disposed on both sides of the counterweight 41 along a third direction. One end of each bending spring 44 is connected to the counterweight 41, and the other end of each bending spring 44 is connected to the cavity wall of the mounting cavity of the housing 1. This arrangement can improve the installation stability of the counterweight 41 by utilizing the bending springs 44, ensuring that the counterweight 41 is suspended inside the housing 1; on the other hand, the bending springs 44 can also generate elastic buffering force and directional movement force for the vibration of the counterweight 41.

[0090] Optionally, the two bent springs 44 are arranged symmetrically about the center of the mounting hole 411. In this embodiment, the drive coil 42 drives the counterweight 41 to vibrate and move horizontally along a third direction, and the bent springs 44 are also used to provide directional force for the overall movement of the counterweight 41.

[0091] Optionally, the bending spring 44 may be L-shaped, V-shaped, U-shaped, W-shaped, or Y-shaped. It is understood that the bending spring 44 may be made of metal or plastic, and no limitation is made thereto. Optionally, the bending spring 44 and the counterweight 41 may be integrally formed, which can improve structural strength and connection stability.

[0092] In one embodiment, the counterweight 41 has bent portions 412 extending toward the first vibration system 3 at both ends along a third direction, so that the counterweight 41 forms an accommodating space 413, in which at least a portion of the magnetic circuit system 2 is accommodated and located between the two bent portions 412.

[0093] In this embodiment, as Figure 3 , Figure 4 , Figure 6 , Figure 13As shown, by providing bent portions 412 extending toward the first vibration system 3 at both ends of the counterweight 41 along a third direction, the counterweight 41 and the two bent portions 412 enclose a receiving space 413, thereby providing receiving and clearance space for the magnetic circuit system 2.

[0094] Understandably, at least a portion of the magnetic circuit system 2 is housed within the accommodating space 413 and located between the two bends 412. This arrangement makes the counterweight 41 and the drive coil 42 more compactly positioned with the magnetic circuit system 2, effectively improving space utilization. In this embodiment, the drive coil 42 is positioned directly opposite the magnetic circuit system 2. Thus, when current is passed through the drive coil 42, it is placed within the magnetic field formed by the magnetic circuit system 2, thereby driving the counterweight 41 to vibrate and move.

[0095] In one embodiment, each bend 412 is provided with a buffer 414 on the side facing the accommodating space 413, and the buffer 414 is located between the magnetic circuit system 2 and the bend 412.

[0096] In this embodiment, as Figure 3 , Figure 4 , Figure 13 As shown, by providing a buffer 414 between the magnetic circuit system 2 and the bent portion 412 of the counterweight 41, the buffer 414 can buffer the vibration of the counterweight 41, preventing the counterweight 41 from colliding with the magnetic circuit system 2 when the drive coil 42 drives it to vibrate in a third direction, thereby preventing damage to the magnetic circuit system 2 or the generation of abnormal noise. Optionally, the buffer 414 is a cushioning foam.

[0097] Of course, in other embodiments, a buffer structure is provided between the counterweight 41 and the outer shell 1. This arrangement allows the buffer structure to cushion the vibration of the counterweight 41. Optionally, the buffer structure can be a cushioning foam or a silicone rubber block, etc. It is understood that the buffer structure is located on both sides of the counterweight 41 along a third direction. That is, the buffer structure is located on the side of the bent spring sheet 44 facing away from the counterweight 41.

[0098] In one embodiment, the counterweight 41 is provided with limiting notches 415 on both sides along the second direction, and the vibration sound generating device 100 is provided with a limiting protrusion 124 corresponding to each limiting notch 415, and the length of each limiting notch 415 along the third direction is greater than the length of each limiting protrusion 124 along the third direction.

[0099] In this embodiment, as Figure 3 , Figure 5 , Figure 7 , Figure 13As shown, by providing limiting notches 415 on both sides of the counterweight 41 along the second direction, and making the limiting protrusion 124 correspond to the limiting notches 415, with the limiting protrusion 124 housed within the limiting notches 415, the limiting protrusion 124 limits the movement of the counterweight 41 along the third direction when the drive coil 42 drives the counterweight 41 to vibrate and move along the third direction, further preventing the counterweight 41 from moving too much along the third direction and colliding with the magnetic circuit system 2. Optionally, the limiting protrusion 124 is fixedly disposed on the outer casing 1.

[0100] Understandably, the extension length of the limiting notch 415 along the third direction is greater than the extension length of the limiting protrusion 124 along the third direction. Understandably, this allows the limiting protrusion 124 to limit the counterweight 41 in the third direction, preventing the counterweight 41 from vibrating too much in the third direction and colliding with the magnetic circuit system 2, thereby affecting the sound output of the speaker structure.

[0101] In one embodiment, the second vibration system 4 further includes a circuit board, one end of which extends into the mounting cavity of the housing 1 and is electrically connected to the drive coil 42.

[0102] Understandable, such as Figure 3 , Figure 7 , Figure 13 As shown, by setting up a circuit board, one end of the circuit board extends into the mounting cavity of the housing 1 and is electrically connected to the drive coil 42. In this way, the circuit board can be used to electrically connect the external circuit with the drive coil 42. Optionally, the circuit board is a flexible circuit board, so that one end of the circuit board can be pasted to the bottom wall of the mounting cavity of the housing 1, and the other end of the circuit board can be bent and extended to the outside of the housing 1 to achieve conductivity.

[0103] In one embodiment, the first vibration system 3 further includes two centering supports 33, which are respectively disposed at both ends of the magnetic circuit system 2 along the second direction. Each centering support 33 includes an outer fixing part 331, an inner fixing part 332, and a spring arm part 333 connecting the outer fixing part 331 and the inner fixing part 332. The inner fixing part 332 is connected to the voice coil 32 and has a solder pad part 334 thereon. The solder pad part 334 corresponds to the end of the common magnetic part 22 along the second direction. The two voice coils 32 are connected in series through the solder pad part 334.

[0104] In this embodiment, as Figure 3 , Figure 5 , Figure 9 , Figure 10As shown, by setting the centering support 33, on the one hand, the centering support 33 effectively avoids the voice coil 32 from polarization and oscillation, and on the other hand, the centering support 33 enables the voice coil 32 to conduct with the external circuit. The centering support 33 can be selected as two, and the two centering supports 33 are symmetrically arranged at both ends of the magnetic circuit system 2 along the second direction, and are respectively connected to the short axis of the voice coil 32.

[0105] In this embodiment, the pad portion 334 of the centering support 33 corresponds to the end of the common magnet portion 22 along the second direction, such that the pad portion 334 is located between the two voice coils 32, which facilitates electrical connection with the leads of the two voice coils 32. Optionally, the two voice coils 32 are connected in series through the centering support 33.

[0106] In one embodiment, the vibration sound-generating device 100 further includes a mounting ring 5 connected to the side magnetic plate 232, the outer periphery of the diaphragm assembly 31 is connected to the mounting ring 5, and the outer fixing part 331 is connected to the side of the mounting ring 5 away from the diaphragm assembly 31.

[0107] In this embodiment, as Figure 3 , Figure 4 , Figures 8 to 10 As shown, the mounting ring 5 can optionally be a square annular frame, meaning that the two ends of the mounting ring 5 extending along the first direction are respectively connected to the diaphragm assembly 31 and the side magnetic portion 23 of the magnetic circuit system 2. It can be understood that the mounting ring 5 has two sides along the second direction and two sides along the third direction. The four sides of the mounting ring 5 facing away from the diaphragm assembly 31 are respectively connected to the side magnetic plates 232 of the two side magnetic portions 23 and the outer fixing portions 331 of the two centering supports 33.

[0108] Optionally, the mounting ring 5 can be a plastic or metal part. By placing the mounting ring 5 between the diaphragm assembly 31 and the magnetic circuit system 2, the first vibration system 3 and the magnetic circuit system 2 are connected, and the first vibration system 3 and the magnetic circuit system 2 form a speaker structure through the mounting ring 5. It is understood that the mounting ring 5 can be a frame, shell, or other structure used to mount and fix the first vibration system 3 and the magnetic circuit system 2 in the speaker structure, and is not limited thereto.

[0109] It is understood that the mounting ring 5 and the side magnetic plate 232 can be integrally injection molded, integrally stretched, or bonded together, etc., and are not limited here. In this embodiment, when the mounting ring 5 is a plastic part, the mounting ring 5 and the side magnetic plate 232 are integrally injection molded; when the mounting ring 5 is a metal part, the mounting ring 5 and the side magnetic plate 232 can be integrally stretched, etc., and are not limited here.

[0110] In one embodiment, the first vibration system 3 further includes a flexible circuit board, one end of which extends into the mounting cavity of the housing 1 and is electrically connected to the outer fixing part 331 of the centering support 33.

[0111] Understandable, such as Figure 3 , Figure 6 As shown, by setting a flexible circuit board, one end of the flexible circuit board extends into the mounting cavity of the housing 1 and is electrically connected to the centering support 33. In this way, the external circuit can be electrically connected to the voice coil 32 using the flexible circuit board. In this embodiment, the other end of the flexible circuit board is bent and extends to the outside of the housing 1 to achieve conductivity.

[0112] In one implementation, such as Figures 1 to 7 As shown, the vibration sound-generating device 100 also includes a housing 1, and the magnetic circuit system 2, the first vibration system 3 and the second vibration system 4 are all disposed inside the housing 1.

[0113] Understandably, by providing the housing 1, the magnetic circuit system 2, the first vibration system 3, and the second vibration system 4 are housed and fixed within the housing 1, thereby integrating the speaker structure and motor structure within the housing 1. The housing 1 is used to install and fix components such as the magnetic circuit system 2, the first vibration system 3, and the second vibration system 4.

[0114] In one embodiment, the outer shell 1 includes a first shell 11 and a second shell 12. The first shell 11 includes a top plate 111 and a support portion 112 connected to the top plate 111. The top plate 111 is a metal part. The support portion 112 is injection molded to the top plate 111. The top plate 111 is opposite to and spaced from the side of the first vibration system 3 facing away from the magnetic circuit system 2. The support portion 112 is used to support the first vibration system 3 and the magnetic circuit system 2. The second shell 12 is a metal part. The second shell 12 includes a bottom plate 121 and a side wall 122 connected to the periphery of the bottom plate 121. The bottom plate 121 is opposite to and spaced from the side of the second vibration system 4 facing away from the magnetic circuit system 2. The end of the side wall 122 away from the bottom plate 121 is connected to the first shell 11. The second vibration system 4 is suspended and connected to the side wall 122.

[0115] In this embodiment, as Figures 1 to 7 As shown, by setting the outer casing 1 into a two-part structure of a first housing 11 and a second housing 12, it is convenient to install and fix the magnetic circuit system 2, the first vibration system 3, and the second vibration system 4. It can be understood that the first housing 11 and the second housing 12 of the outer casing 1 cooperate to form a mounting cavity. By fixing the magnetic circuit system 2 and the first vibration system 3 to the first housing 11, and suspending the second vibration system 4 to the second housing 12, the first housing 11 and the second housing 12 are combined to achieve the assembly of the vibration sound-generating device 100.

[0116] Understandably, the sidewall 122 of the second housing 12 is connected to the periphery of the base plate 121, so that the sidewall 122 and the base plate 121 enclose a receiving cavity with one open end. The second vibration system 4 is located in this receiving cavity and is suspended and connected to the sidewall 122, such that the base plate 121 and the side of the second vibration system 4 facing away from the magnetic circuit system 2 are opposite and spaced apart. By covering the opening of the receiving cavity of the second housing 12 with the first housing 11, specifically by covering the opening of the receiving cavity of the second housing 12 with the top plate 111, a sealed connection is achieved, that is, the end of the sidewall 122 away from the base plate 121 is connected to the top plate 111. By making both the top plate 111 and the second housing 12 metal parts, the cavity volume and heat dissipation performance of the outer shell 1 can be increased.

[0117] In this embodiment, the top plate 111 of the first housing 11 can be a metal part, and the support part 112 can be a plastic part. The top plate 111 and the support part 112 of the first housing 11 are integrally injection molded structures, that is, the support part 112 is integrally injection molded onto the top plate 111. This can improve both the connection strength and the sealing performance. It can be understood that the support part 112 is used to support the first vibration system 3 and the magnetic circuit system 2.

[0118] In one embodiment, the top plate 111 is provided with adhesive gripping holes 1111, and a portion of the support portion 112 is embedded in the adhesive gripping holes 1111.

[0119] In this embodiment, as Figure 1 , Figures 3 to 5 As shown, the support portion 112 can optionally be integrally injection molded onto the top plate 111, such that a portion of the support portion 112 is embedded within the adhesive-holding hole 1111. It can be understood that by providing the adhesive-holding hole 1111 on the top plate 111, and thus integrally injection molding the support portion 112 onto the top plate 111, with a portion of the support portion 112 embedded within the adhesive-holding hole 1111, the connection strength and connection stability are further improved.

[0120] Understandably, the outer periphery of the diaphragm assembly 31 is sandwiched between the support portion 112 and the mounting ring 5, so that the front acoustic cavity formed by the side of the diaphragm assembly 31 facing away from the magnetic circuit system 2 and the first housing 11 is sealed and isolated from the side of the diaphragm assembly 31 facing the magnetic circuit system 2.

[0121] In this embodiment, the top plate 111 of the first housing 11 is opposite to and spaced apart from the diaphragm assembly 31 of the first vibration system 3, so as to form a front acoustic cavity between the top plate 111 and the diaphragm assembly 31. It can be understood that in order to ensure that the sound emitted by the vibration of the diaphragm assembly 31 is smoothly transmitted to the outside of the housing 1, a sound outlet 1123 is provided on one side of the support portion 112, and the sound outlet 1123 extends to the outside of the housing 1.

[0122] Understandably, the sound outlet 1123 can be a sound outlet channel or a sound outlet hole, and the sound outlet 1123 communicates with the front acoustic cavity formed between the top plate 111 and the diaphragm assembly 31. In this embodiment, the sound outlet 1123 extends to the outside of the housing 1 and is located on the side of the first vibration system 3 and the magnetic circuit system 2, so that the vibration sound generating device 100 forms a side sound outlet structure.

[0123] In this embodiment, the support portion 112 of the first housing 11 extends to the outside of the side wall 122 of the second housing 12 on one side where the sound-emitting portion 1123 is provided. The side wall 122 of the second housing 12 is provided with an avoidance notch corresponding to the sound-emitting portion 1123, which is not limited here.

[0124] Of course, in other embodiments, the top plate 111 of the first housing 11 is provided with a sound outlet, which is directly opposite to the diaphragm assembly 31 of the first vibration system 3, so that the vibration sound generating device 100 forms a positive sound output structure, which is not limited here.

[0125] In this embodiment, the second housing 12 may be a metal component. The top plate 111 of the first housing 11 includes a central portion and an edge portion located on the outer periphery of the central portion. The edge portion bends and extends relative to the central portion toward the direction close to the second housing 12. The edge portion abuts against the side wall 122 of the second housing 12 to define an adhesive application groove with the side wall 122 of the second housing 12. Optionally, the edge portion may have an L-shaped structure.

[0126] In one embodiment, the groove for applying adhesive is filled with sealant, which solidifies to form a seal. The seal surrounds the periphery of the junction between the edge portion and the sidewall 122 of the second housing 12, thereby sealingly connecting the first housing 11 and the second housing 12. This further improves the sealing and waterproof performance of the housing 1, resulting in a good sealing effect for the vibration sound-generating device 100, effectively enhancing the waterproof rating and achieving the IP68 waterproof requirement.

[0127] Alternatively, the sealing element may be a sealing strip, a sealing ring, or other structure capable of achieving a sealing effect, and there is no limitation herein.

[0128] In one embodiment, the diaphragm assembly 31 includes a diaphragm 311 and a reinforcing member 312. The diaphragm 311 includes a central portion, a folded portion surrounding the central portion, and a fixing portion connected to the outside of the folded portion. The reinforcing member 312 is disposed in the central portion, and the fixing portion is connected to the first housing 11.

[0129] In this embodiment, as Figures 3 to 5 , Figures 8 to 10As shown, the fixing part of the diaphragm assembly 31 is sandwiched between the mounting ring 5 and the support part 112. Both voice coils 32 are connected to the central part or the reinforcing member 312. Understandably, in order to achieve weight reduction and improved vibration effect, the central part of the diaphragm 311 is provided with a hollow hole, and the reinforcing member 312 is connected to the central part and covers the hollow hole.

[0130] Understandably, the ends of the two voice coils 32 furthest from the magnetic circuit system 2 are connected to the reinforcing member 312. In this embodiment, as... Figure 4 and Figure 8 As shown, the reinforcing member 312 has a connecting protrusion 3121 corresponding to each voice coil 32, and each connecting protrusion 3121 is connected to one end of a voice coil 32 adjacent to the diaphragm assembly 31. With this arrangement, the position of the voice coil 32 within the magnetic gap 25 can be adjusted by using the connecting protrusion 3121, thereby ensuring that the voice coil 32 is located in the dense magnetic field line area of ​​the magnetic circuit system 2.

[0131] In this embodiment, the side of the diaphragm assembly 31 facing the magnetic circuit system 2 forms a rear acoustic cavity with the first housing 11 and the second housing 12 to form a speaker structure. In one embodiment, the second housing 12 is further provided with a vent hole communicating with the rear acoustic cavity, and the vibration sound generating device 100 further includes a venting element that covers the vent hole.

[0132] Understandable, such as Figure 2 and Figure 6 As shown, by providing a vent hole that connects to the rear acoustic cavity, air can be released from the rear acoustic cavity, ensuring air pressure balance on both sides of the diaphragm assembly 31. To further improve the sound generation effect of the vibration sound-generating device 100, an isolating component is also provided inside the housing 1. The isolating component divides the rear acoustic cavity into a fixed cavity for installing the magnetic circuit system 2 and the second vibration system 3, and a filling cavity. Sound-absorbing particles can be filled into the filling cavity through the vent hole, and the vent hole can be sealed with a venting component to prevent leakage of sound-absorbing particles.

[0133] The present invention also proposes an electronic device including the aforementioned vibration sound-generating device 100. The specific structure of the vibration sound-generating device 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0134] It is understood that electronic devices can be mobile phones, wearable devices, etc., and are not limited here. Electronic devices also include device housings, and the vibration sound-generating device 100 is disposed on the device housing. The device housing can be the outer shell of an electronic device or the outer shell of a wearable device, etc., and is not limited here.

[0135] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A vibration sound production device, characterized by comprising: The vibration sound production device comprises a magnetic circuit system, a first vibration system and a second vibration system, the first vibration system and the second vibration system are located on two sides of the magnetic circuit system along a first direction; The magnetic circuit system comprises a magnetic conductive plate, a common magnetic part, two edge magnetic parts and two center magnetic parts provided on the magnetic conductive plate, the common magnetic part, the two edge magnetic parts and the two center magnetic parts all extend along a second direction perpendicular to the first direction, the two center magnetic parts are located between the two edge magnetic parts, and the common magnetic part is located between the two center magnetic parts, so that each center magnetic part is spaced from the common magnetic part and an edge magnetic part to form a magnetic gap; The first vibration system vibrates along the first direction, the first vibration system comprises a diaphragm assembly and two voice coils connected to the diaphragm assembly, the two voice coils are arranged in parallel, the two voice coils are annular voice coils formed by winding wires, each voice coil has a height along the first direction, the height is greater than or equal to the thickness between the inner wall surface and the outer wall surface of the voice coil, and each voice coil is arranged corresponding to the magnetic gap; The second vibration system vibrates along a third direction perpendicular to the first direction and the second direction, the second vibration system comprises two drive coils, each drive coil has two long sides extending along the second direction, adjacent long sides of the two drive coils are arranged corresponding to the common magnetic part, and the other long side is arranged corresponding to the center magnetic part; The width of the common magnetic part along the third direction is greater than or equal to 1.2 times the width of the center magnetic part along the third direction.

2. The vibration sound production device of claim 1, wherein The common magnetic part comprises a common magnet and a common magnetic conductive plate arranged in layers, and the common magnet is connected with the magnetic conductive plate; Each edge magnetic part comprises an edge magnet and an edge magnetic conductive plate arranged in layers, and the edge magnet is connected with the magnetic conductive plate; Each center magnetic part comprises a center magnet and a center magnetic conductive plate arranged in layers, and the center magnet is connected with the magnetic conductive plate; The common magnet, the two edge magnets and the two center magnets are magnetized along the first direction, the magnetization directions of the two center magnets are opposite to those of the common magnet and the two edge magnets, and the current directions in the adjacent long sides of the two drive coils are the same.

3. The vibration sound production device of claim 1, wherein The magnetic conductive plate is provided with an opening corresponding to the common magnetic part and the two center magnetic parts, and parts of the common magnetic part and the two center magnetic parts are arranged in the opening and arranged corresponding to the long sides of the two drive coils; The opening is one; or the opening comprises three, the adjacent openings form a rib, and the common magnetic part and the two center magnetic parts correspond to the three openings one by one.

4. The vibration sound production device of claim 3, wherein The common magnetic part and the two center magnetic parts each comprise a main body part located on the side of the magnetic conductive plate facing the diaphragm assembly and a protruding part extending towards the opening; The side of the protruding part facing the drive coil is flush with the side of the magnetic conductive plate facing the drive coil.

5. The vibration sound production device of claim 1, wherein The second vibration system further comprises a counterweight provided with a mounting hole, at least part of the two drive coils are arranged in the mounting hole.

6. The vibration sound production device of claim 5, wherein The second vibration system further comprises a mounting plate corresponding to the mounting hole, the mounting plate is connected to the counterweight and located on the side of the two drive coils away from the magnetic circuit system, and the two drive coils are arranged on the mounting plate. The mounting plate is welded or bonded to the counterweight; the mounting plate is a magnetic conductive plate; and / or one end of the two drive coils along the second direction is a wire end, and the wire end protrudes from the end of the mounting plate along the second direction.

7. The vibration sound production device of claim 5, wherein The two ends of the counterweight along the third direction are provided with bending portions extending towards the first vibration system, so that the counterweight forms an accommodation space, and at least part of the magnetic circuit system is accommodated in the accommodation space and located between the two bending portions.

8. The vibration sound production device of claim 7, wherein The side of each bending portion facing the accommodation space is provided with a buffer between the magnetic circuit system and the bending portion. The two sides of the counterweight along the second direction are provided with limiting notches, the vibration sound production device is provided with a limiting protrusion corresponding to each limiting notch, and the length of each limiting notch along the third direction is greater than the length of each limiting protrusion along the third direction.

9. The vibration sound production device of claim 6, wherein The vibration sound production device further comprises a shell, and the second vibration system further comprises two bending elastic sheets, one end of each bending elastic sheet is connected to the counterweight, and the other end of each bending elastic sheet is connected to the shell, so that the second vibration system is suspended in the shell. The two bending elastic sheets are arranged on the two sides of the counterweight along the third direction.

10. An electronic device, comprising: The electronic device comprises the vibration sound production device according to any one of claims 1 to 9. The electronic device comprises the vibration sound production device according to any one of claims 1 to 9.

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