A sound-generating vibration device and electronic equipment

Abstract

The present invention belongs to the technical field of terminal equipment manufacturing, and specifically relates to a sound-generating vibration device and an electronic device, wherein the sound-generating vibration device includes a vibration motor and a sound-generating unit, the vibration motor includes a drive system and a magnetic circuit system matched with the drive system, the sound-generating unit includes a vibration system matched with the magnetic circuit system, and the vibration system and the magnetic circuit system have a common vibration direction. According to the sound-generating vibration device of the present invention, while the sound-generating vibration device realizes vibration and sound generation, it not only effectively reduces the overall thickness of the vibration motor and the sound-generating unit in the vibration direction, which not only makes room for optimizing the sound-generating unit, but also can effectively alleviate the shell vibration problem of the generating device and improve the user experience.

Description

Technical Field

[0001] The present invention belongs to the technical field of terminal equipment manufacturing, and in particular relates to a sound-generating vibration device and an electronic device. Background Art

[0002] With the rapid development of smart wearable products, users' demand for sound has risen to the demand for sound quality. The sound of the audio system is emitted by the front-end acoustic transducer, and the quality of the acoustic device will affect the sound quality of the entire audio system. In theory, the low-frequency driving ability of the speaker in the acoustic device is closely related to the maximum volume driving force of its diaphragm. Improving the maximum volume driving force has become the most mainstream direction for the design optimization and application improvement of micro speakers. However, as the maximum volume driving force of the speaker increases, the vibration generated when it sounds also increases accordingly, which causes the shell vibration problem on the whole machine end, affecting the user experience.

[0003] On the other hand, the demand for tactile feedback devices in smart wearable products has gradually become prominent. However, the lightweight development demand of smart wearable products conflicts with the large size of acoustic devices and tactile feedback devices. The existing acoustic and tactile devices cannot meet the design requirements of the entire machine at the same time. Summary of the invention

[0004] The object of the present invention is to provide a sound-generating vibration device and an electronic device, so as to at least solve the problem that the sound-generating vibration device integrated with a vibration motor in the prior art is large in size and has shell vibration.

[0005] A first aspect of the present invention provides a sound-generating vibration device, the sound-generating vibration device comprising:

[0006] case;

[0007] A vibration motor, the vibration motor is arranged in the housing and comprises a drive system and a magnetic circuit system matched with the drive system, the drive system is fixed to the housing, the magnetic circuit system comprises at least a yoke, and the yoke is elastically connected to the housing through an elastic component;

[0008] A sound-generating unit is disposed in the shell and includes a vibration system that matches the magnetic circuit system; the vibration system is elastically connected to the shell and has the same vibration direction as the magnetic circuit system.

[0009] According to the sound-generating vibration device of the present invention, by providing a vibration motor and a sound-generating unit, and making the vibration motor and the sound-generating unit share a magnetic circuit system, the overall thickness of the sound-generating vibration device in the vibration direction is effectively reduced while achieving vibration and sound generation, and while ensuring the sound and vibration performance of the sound-generating vibration device, space is freed up for the optimization of the sound-generating unit, thereby improving the sound quality of the sound-generating vibration device. At the same time, when the sound-generating unit is working, since the magnetic circuit system is elastically connected to the shell and is subjected to the reaction force of the vibration system, the magnetic circuit system can vibrate synchronously with the vibration system at the same vibration frequency and in the opposite vibration direction under the action of the reaction force, thereby offsetting the vibration effect of the sound-generating unit to a certain extent, thereby reducing the shell vibration problem of the sound-generating vibration device and improving the user experience. In addition, the provision of the elastic component can elastically support the magnetic circuit system, thereby ensuring the vibration capacity of the magnetic circuit system.

[0010] In addition, the sound-generating vibration device according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the magnetic circuit system also includes side magnets and a center magnet arranged on the yoke, and a magnetic gap is formed between the side magnets and the center magnet; the vibration system includes a voice coil, and the voice coil is inserted into the magnetic gap; the coil is located outside the side magnets.

[0012] In some embodiments of the present invention, the elastic component includes at least two elastic members, at least two of the elastic members are arranged along the circumference of the yoke, and two ends of any one of the elastic members are respectively connected to the yoke and the shell.

[0013] In some embodiments of the present invention, the elastic member includes an elastic portion and a first connecting portion and a second connecting portion respectively connected to two ends of the elastic portion, the first connecting portion is connected to the yoke, and the second connecting portion is connected to the shell.

[0014] In some embodiments of the present invention, the elastic portion is a W-shaped member, one end of the W-shaped member extends outward to form the first connecting portion, and the other end of the W-shaped member extends outward to form the second connecting portion.

[0015] In some embodiments of the present invention, the number of the elastic members is four, and the four elastic members are evenly arranged at two ends of the shell.

[0016] In some embodiments of the present invention, there are two elastic parts, and the two elastic parts are arranged on both sides of the first connecting part and the second connecting part; the elastic part includes a U-shaped connecting part and two vibration arms connected to the free ends of the U-shaped connecting part, one of the vibration arms is connected to the first connecting part, and the other vibration arm is connected to the second connecting part.

[0017] In some embodiments of the present invention, L-shaped bending portions are provided at both ends of the yoke, the first folded edge of the bending portion is perpendicular to the vibration direction of the magnetic circuit system, and the second folded edge is connected to the first connecting portion; a boss is provided on the bottom surface of the shell, and the boss is connected to the second connecting portion.

[0018] In some embodiments of the present invention, a horizontal center line of the magnetic circuit system does not coincide with a horizontal center line of the elastic member.

[0019] Another aspect of the present invention provides an electronic device, which comprises any one of the above-mentioned sound-generating vibration devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the sound-generating vibration device in some embodiments of the present application;

[0022] Figure 2 for Figure 1 An exploded view of an embodiment of a sound-generating vibration device;

[0023] Figure 3 for Figure 2 A schematic diagram of the structure of the front side of the sound-generating vibration device;

[0024] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0025] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure of the middle BB;

[0026] Figure 6 for Figure 3 A structural schematic diagram of the elastic member;

[0027] Figure 7 for Figure 6 Schematic diagram of the connection structure of the elastic member;

[0028] Figure 8 for Figure 7 A schematic diagram of the local structure from another angle;

[0029] Fig. 9 for Figure 1 An exploded view of another embodiment of the sound-generating vibration device;

[0030] Fig.10 for Fig. 9 A schematic diagram of the structure of the elastic member;

[0031] Fig.11 for Fig. 9 Schematic diagram of the connection structure of the elastic member;

[0032] Fig.12 for Fig.10 A schematic diagram of the connection of the magnetic circuit system of the elastic member;

[0033] Fig.13 for Figure 1 Schematic diagram of the vibration system.

[0034] Description of reference numerals:

[0035] 1: Sound-generating vibration device;

[0036] 10: sound unit;

[0037] 11: vibration system, 111: diaphragm, 1111: folding ring, 1112: inner fixing part, 1113: outer fixing part, 112: dome, 113: voice coil;

[0038] 12: Centering support piece;

[0039] 20: Vibration motor;

[0040] 21: magnetic circuit system, 211: magnetic yoke, 2111: bending portion, 212: side magnet, 213: center magnet, 214: first magnetic conductive plate, 215: second magnetic conductive plate;

[0041] 22: driving coil;

[0042] 23: elastic member, 231: first connecting portion, 232: second connecting portion, 233: elastic portion, 2331: W-shaped member, 2332: U-shaped connecting portion, 2333: vibration arm;

[0043] 30: Shell;

[0044] 31: cover plate, 32: middle shell, 321: injection molded shell, 3211: first extension part, 322: connecting insert, 3221: second extension part, 33: lower shell, 331: boss, 34: first limiter, 35: second limiter, 36-flexible printed circuit board. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0046] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0047] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0048] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0049] As electronic devices are becoming more and more intelligent and lightweight at this stage, for the sound-generating vibration device 1 coupled with the vibration motor 20, while ensuring the sound quality of the sound-generating vibration device 1 and the vibration function of the vibration motor 20, more attention is paid to improving the sound quality, thereby improving the performance of the sound-generating vibration device 1. A first aspect of the present application proposes a sound-generating vibration device 1, which is used in an electronic device, so that the electronic device can generate sound and vibrate.

[0050] Combination Figures 1 to 13 In some embodiments of the present application, the sound-generating vibration device 1 includes a vibration motor 20 and a sound-generating unit 10. The vibration motor 20 includes a drive system and a magnetic circuit system 21 that cooperates with the drive system. The sound-generating unit 10 includes a vibration system 11 that cooperates with the magnetic circuit system 21. The vibration motor 20 and the sound-generating unit 10 share the same magnetic circuit system 21, and the vibration direction of the vibration system 11 is the same as that of the magnetic circuit system 21.

[0051] Specifically, Figure 4-5As shown, the driving system is arranged on the outside of the magnetic circuit system 21, and is suitable for driving the magnetic circuit system 21 to vibrate up and down to realize the vibration function of the vibration motor 20; the vibration system 11 is stacked on the top of the magnetic circuit system 21, and the vibration system 11 is driven to vibrate through the magnetic circuit system 21 to realize sound. Due to the shared magnetic circuit system 21, the sound-generating vibration device 1 effectively reduces the overall thickness of the vibration motor 20 and the sound-generating unit 10 in the vibration direction while realizing vibration and sound, thereby reducing the overall thickness of the sound-generating vibration device 1, ensuring the sound and vibration functions of the sound-generating vibration device 1, and facilitating the optimization of the generating unit in the sound-generating vibration device 1 to improve the sound quality. In addition, when the sound-generating unit 10 is working, since the magnetic circuit system 21 is elastically connected to the housing 30 and is subjected to the reaction force of the vibration system 11, the magnetic circuit system 21 can vibrate synchronously with the vibration system 11 under the action of the reaction force at the same vibration frequency and in the opposite vibration direction, thereby offsetting the vibration effect of the sound-generating unit 10 to a certain extent, thereby reducing the shell vibration problem of the sound-generating vibration device 1 and improving the user experience.

[0052] Specifically, Figure 4 , Figure 5 and Fig.13 As shown, in some embodiments of the present application, the vibration system 11 includes a diaphragm 111, a dome 112 and a voice coil 113. The diaphragm 111 is a planar diaphragm 111. The diaphragm 111 includes a folding ring portion 1111 and an inner fixing portion 1112. The dome 112 is fixed to the inner fixing portion 1112. Further, the dome 112 is connected to the surface of the inner fixing portion 1112 away from the magnetic circuit system 21. One end of the voice coil 113 is connected to the dome 112, and the other end of the voice coil 113 is inserted into the magnetic gap of the magnetic circuit system 21.

[0053] By inserting the bottom end of the voice coil 113 into the magnetic gap of the magnetic circuit system 21, when the voice coil 113 is energized, the voice coil 113 can vibrate up and down along its own axis under the action of the magnetic circuit system 21, and directly drive the dome 112 to vibrate, thereby vibrating and making sound.

[0054] Combination Figure 4 , Figure 5 and Fig.13 As shown, in some embodiments of the present application, the folding ring portion 1111 is protruded toward the direction of the magnetic circuit system 21. That is, the folding ring portion 1111 is protruded toward the inner direction of the sound-generating vibration device 1, thereby further reducing the outer thickness dimension of the sound-generating vibration device 1, hiding the folding ring portion 1111 inside the sound-generating vibration device 1, and having enough vibration space, thereby further reducing the overall thickness dimension of the sound-generating vibration device 1.

[0055] Combination Figure 2 , Figure 5 , Figure 7 , Figure 8 , Fig. 9 , Fig.11 As shown, in some embodiments of the present application, the magnetic circuit system 21 includes a yoke 211 and a side magnet 212 and a center magnet 213 disposed on the yoke 211, and a magnetic gap is formed between the side magnet 212 and the center magnet 213. The magnetization directions of the side magnet 212 and the center magnet 213 are opposite, and both are perpendicular to the vibration direction of the magnetic circuit system 21.

[0056] Specifically, in some embodiments of the present application, the first magnetic yoke 211 is a rectangular plate structure, and the side magnets 212 and the center magnet 213 are both connected to the magnetic yoke 211 by gluing. Figure 7 , Fig.11 The number of the side magnets 212 is 4, which are arranged in two parallel rows to surround the two sides of the center magnet 213, thereby forming a magnetic gap for the voice coil 113 to be inserted.

[0057] In some embodiments of the present application, a first magnetic conductive plate 214 is further provided on the surface of the central magnet 213 facing upwards of the vibration system 11, and a second magnetic conductive plate 215 is further provided on the surface of the outer magnet facing the vibration system 11, and the gap is formed between the first magnetic conductive plate 214, the central magnet 213, the second magnetic conductive plate 215, and the side magnet 212. The first magnetic conductive plate 214 and the second magnetic conductive plate 215 are respectively attached to the upper surfaces of the central magnet 213 and the side magnet 212, so as to enhance the magnetic field strength passing through the voice coil 113.

[0058] By inserting the end of the voice coil 113 into the magnetic gap formed by the first magnetic conductive plate 214, the center magnet 213, the second magnetic conductive plate 215 and the side magnet 212, when the voice coil 113 vibrates, not only a balanced magnetic driving force can be obtained, but also the vibration space can be fully utilized.

[0059] In some embodiments of the present application, the driving system includes two driving coils 22, and the two driving coils 22 are respectively arranged on both sides of the magnetic circuit system 21. Specifically, the driving coil 22 is located in the magnetic field formed by the edge magnet 212. When power is turned on, there is an Ampere force between the driving coil 22 and the edge magnet 212, and relative movement occurs under the drive of the Ampere force. Since the driving coil 22 is fixed, the edge magnet 212 vibrates under the reaction, thereby driving the magnetic circuit system 21 to vibrate together, thereby realizing the vibration function of the vibration motor 20.

[0060] Combination Figure 2 , Figure 4 , Figure 5 , Fig. 9As shown, in some embodiments of the present invention, the sound-generating vibration device 1 also includes a shell 30, wherein the driving system is fixed to the shell 30, the magnetic circuit system 21 is elastically connected to the shell 30 through an elastic component, and the vibration system 11 is elastically connected to the shell 30.

[0061] In some embodiments of the present invention, the shell 30 is a rectangular parallelepiped shell structure, including a cover plate 31, a middle shell 32 and a lower shell 33. The cover plate 31 is a rectangular ring structure, and a central opening is provided in the center thereof for the vibration system 11 to vibrate. The middle shell 32 includes an injection molded shell 321 located at both ends and a connecting insert 322 spanning the long axis and disposed on both sides. The injection molded shell 321 and the connecting insert 322 are injection molded as a whole to form the middle shell 32; each end of the injection molded shell 321 extends inwardly with a first extension portion 3211, so that the first extension portion 3211 is disposed at the diagonal of the middle shell 32, and the end of the connecting insert 322 extends inwardly with a second extension portion 3221, and the second extension portion 3221 is located between the two first extension portions 3211 at the same end. The upper surface of the middle shell is a plane, and its injection molded shell is fixedly connected to the cover plate 31 by fasteners. The lower surface of the middle shell is a special shape, and is adapted and welded with the groove-shaped lower shell through the connecting inserts disposed on both sides. The cover plate 31 , the middle shell 32 and the lower shell 33 together form a vibration chamber for installing the vibration motor 20 and the sound unit 10 .

[0062] Furthermore, in some embodiments of the present application, the outer edge of the diaphragm 111 is connected to the middle shell 32 by gluing, hot pressing or integral injection molding.

[0063] Recombination Fig.13 As shown, the diaphragm 111 is also provided with an external fixing portion 1113, which is arranged at the outer edge of the diaphragm 111 and connected to the folding ring portion 1111. The diaphragm 111 is connected to the upper surface of the middle shell 32 through the external fixing portion 1113, and then the fixing portion is tightened by the cooperation of the cover plate 31 and the middle shell 32 to strengthen the connection.

[0064] In some embodiments of the present application, the diaphragm 111 is an integral injection-molded part, which can effectively improve the overall strength of the diaphragm 111 and ensure the vibration effect while avoiding separation from the dome 112 during the vibration process.

[0065] In some embodiments of the present application, the top of the voice coil 113 is connected to the dome 112, and the bottom of the voice coil 113 is connected to the middle shell 32 through the centering support plate 12 assembly, thereby fixing the two ends of the voice coil 113 to ensure that the voice coil 113 vibrates up and down in the magnetic gap. Specifically, the centering support plate assembly includes four, and the four centering support plates 12 are arranged along the two diagonal portions of the middle shell 32, and are respectively connected to the first extension portion 3211 formed by extending inward from the diagonal portions of the injection molded outer shell 321 in the middle shell 32, thereby further ensuring the support strength of the voice coil 113.

[0066] In some embodiments of the present application, a driving coil 22 is mounted on the groove wall of the lower shell 33, and a boss 331 suitable for connecting to the magnetic circuit system 21 is provided at the bottom of the groove. The driving coil 22 is powered through a flexible printed circuit board 36 provided at the bottom of the groove of the lower shell 33.

[0067] like Figure 2 , Fig. 9 As shown, in some embodiments of the present application, the vibration motor 20 further includes an elastic component, and the yoke 211 is connected to the lower shell 33 via the elastic component.

[0068] In some embodiments of the present application, the elastic member 23 includes an elastic portion 233 and a first connection portion 231 and a second connection portion 232 respectively connected to both ends of the elastic portion 233 . The first connection portion 231 is connected to the yoke 211 , and the second connection portion 232 is connected to the lower shell 33 .

[0069] like Figure 6 As shown, in some embodiments of the present application, the elastic portion 233 is a W-shaped member 2331 , one end of the W-shaped member 2331 extends outward to form a first connection portion 231 , and the other end extends outward to form a second connection portion 232 .

[0070] Specifically, the elastic member 23 is a planar structure, which includes a W-shaped member 2331 and a first connection portion 231 and a second connection portion 232 connected to both ends of the W-shaped member 2331, and is suitable for ensuring the normal vibration process of the elastic member 23 through the deformation ability of the W-shaped member 2331. The first connection portion 231 is connected to the yoke 211 by welding, and the second connection portion 232 is clamped between the middle shell 32 and the lower shell 33. Specifically, the boss 331 set on the short axis side of the bottom wall of the lower shell 33 is adapted to clamp the second connection portion 232 with the bottom surface of the injection molded shell 321.

[0071] like Figure 7 , Figure 8 As shown, in some embodiments of the present application, the number of the elastic members 23 is four, and the four elastic members 23 are evenly distributed at both ends of the housing 30 , thereby further ensuring the elastic support strength of the magnetic circuit system 21 .

[0072] like Figure 2 As shown, in some embodiments of the present application, a limit assembly is provided above and below the yoke 211 to limit the vibration range of the magnetic circuit system 21. Specifically, a first limit member 34 is provided above the yoke 211, and the first limit member 34 is provided on the lower surface of the second extension portion 3221 formed by extending inward from the end of the middle shell 32, and is suitable for contacting with the upper surface of the yoke 211; a second limit member 35 is provided below the yoke 211, and the second limit member 35 is provided on the bottom surface of the lower shell 33, and is suitable for contacting with the lower surface of the yoke 211.

[0073] like Fig. 9 , Fig.11 As shown, in some embodiments of the present application, there are two elastic parts 233, and the two elastic parts 233 are respectively arranged on both sides of the first connection part 231 and the second connection part 232; the elastic part 233 includes a U-shaped connection part 2332 and two vibration arms 2333 connected to the free end of the U-shaped connection part 2332, one of the vibration arms 2333 is connected to the first connection part 231, and the other vibration arm 2333 is connected to the second connection part 232.

[0074] Specifically, the elastic member 23 is approximately a diamond-shaped structure, the first connection portion 231 and the second connection portion 232 are arranged at a set of diagonals of the diamond-shaped structure, and the two U-shaped connection portions 2332 are arranged at another set of diagonals. The U-shaped connection portion 2332 is connected to the first connection portion 231 and the second connection portion 232 through a vibration arm 2333; the vibration arm 2333 has deformation ability, and the U-shaped connection portion 2332 does not have deformation ability. The elastic member 23 ensures the normal vibration process of the elastic member 23 through the compression deformation ability of the vibration arm 2333.

[0075] Combination Fig. 9 , Fig.11 As shown, in some embodiments of the present application, L-shaped bending portions 2111 are provided at both ends of the yoke 211, the first folded edge of the bending portion 2111 is vertically connected to the vibration direction of the magnetic circuit system 21, and the second folded edge is connected to the first connecting portion 231; a boss 331 is provided on the bottom surface of the shell 30, and the boss 331 is welded or glued to the second connecting portion 232.

[0076] Combination Fig.11 As shown, the first folded edge of the L-shaped bending portion 2111 is perpendicular to the yoke 211, and forms a magnetic gap with the central magnet 213 provided on the yoke 211 for the voice coil 113 to be inserted and vibrated. The second folded edge of the L-shaped bending portion 2111 is parallel to the bottom surface of the lower shell 33, and is suitable for connecting with the first connecting portion 231. The bottom surface of the lower shell 33 is provided with a boss 331 corresponding to the second folded edge, and the boss 331 is suitable for connecting with the second connecting portion 232. Specifically, the boss 331 is a step of the stretching process.

[0077] Combination Fig.12 As shown, in some embodiments of the present application, the horizontal center line of the magnetic circuit system 21 does not coincide with the horizontal center line of the elastic member 23. Specifically, the horizontal center line of the elastic member 23 is the horizontal symmetry axis of its structure, that is, Fig.12 L1; the horizontal center line of the magnetic circuit system 21 is the yoke 211, the center magnet 213, and the first magnetic plate 214 at 1 / 2 of the height, that is, Fig.12L2; the horizontal center line of the magnetic circuit system 21 does not coincide with the horizontal center line of the elastic member 23, that is, there is a distance h between L1 and L2. Based on the rhombus-like structure of the elastic member 23, the magnetic circuit system 21 not only has a first-order mode of up and down vibration, but also has a second-order mode of vibration around the central magnet 213 (the first connecting portion 231 is polarized left and right relative to the second connecting portion 232). By making the horizontal center line of the magnetic circuit system 21 and the horizontal center line of the elastic member 23 not coincide, the distance between the horizontal center line and the horizontal center line of the elastic member 23 is equivalent to the force arm of the second-order mode of the magnetic circuit system 21. By adding the force arm, a higher frequency is required to excite the second-order mode, thereby increasing the difficulty of exciting the second-order mode, reducing the vibration of the magnetic circuit system 21 in non-restricted directions, and further improving the vibration stability.

[0078] Another aspect of the present application also provides an electronic device having the above-mentioned sound-generating vibration device 1. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sound-generating vibration device, characterized in that: include: A shell, comprising a cover plate, a middle shell and a lower shell which enclose and form a vibration chamber, wherein the middle shell comprises an injection-molded shell located at two ends and connecting inserts located at two sides of the injection-molded shell, wherein the injection-molded shell and the connecting insert are injection-molded as one piece; a second extension portion is extended inwardly at the end of each injection-molded shell, so that the second extension portion is arranged at the diagonal of the middle shell, a first extension portion is extended inwardly at the end of the connecting insert, and the first extension portion is arranged between the two second extension portions at the same end; the upper surface of the middle shell is a plane and is connected to the annular cover plate, the lower surface of the middle shell is a special shape and is adapted and welded with the groove-shaped lower shell through the connecting inserts on both sides; the lower shell is provided with a boss; A vibration motor, the vibration motor is arranged in the housing and includes a drive system and a magnetic circuit system matched with the drive system, the drive system includes a drive coil, the drive coil is fixed to the housing outside the magnetic circuit system, the magnetic circuit system at least includes a yoke, and the yoke is connected to the housing through elastic components located at both ends of the magnetic circuit system; A sound-generating unit, the sound-generating unit is arranged in the shell, and includes a vibration system matched with the magnetic circuit system; the vibration system is elastically connected to the shell and parallel to the vibration direction of the magnetic circuit system; the vibration system includes a diaphragm, the diaphragm is provided with an external fixing part, the diaphragm is connected to the upper surface of the middle shell through the external fixing part, and then the cover plate is matched with the middle shell to press the external fixing part to strengthen the connection; The elastic component includes an elastic member, the elastic member includes a second connecting portion, and the second connecting portion is connected to the boss; The vibration system includes a voice coil, the bottom end of which is connected to the middle shell via a centering support plate; four centering support plates are arranged along two diagonal corners of the middle shell, and are respectively connected to the second extension portions formed by extending inwardly from the diagonal corners of the middle shell; A first limiter is provided above the yoke, and the first limiter is provided on the lower surface of the second extension portion formed by extending inward from the end of the middle shell, and is suitable for contacting with the upper surface of the yoke; a second limiter is provided below the yoke, and the second limiter is provided on the bottom surface of the lower shell, and is suitable for contacting with the lower surface of the yoke.

2. The sound-generating vibration device according to claim 1, characterized in that: The magnetic circuit system further comprises a side magnet and a center magnet disposed on the magnetic yoke, and a magnetic gap is formed between the side magnet and the center magnet; The voice coil is inserted into the magnetic gap.

3. The sound-generating vibration device according to claim 1, characterized in that: The elastic component includes at least two elastic members, and the at least two elastic members are arranged along the circumference of the magnetic yoke, and two ends of any one of the elastic members are respectively connected to the magnetic yoke and the shell.

4. The sound-generating vibration device according to claim 3, characterized in that: The elastic member includes an elastic portion and a first connecting portion, the first connecting portion and the second connecting portion are respectively connected to two ends of the elastic portion, and the first connecting portion is connected to the yoke.

5. The sound-generating vibration device according to claim 4, characterized in that: The elastic part is a W-shaped component, one end of the W-shaped component extends outward to form the first connecting part, and the other end of the W-shaped component extends outward to form the second connecting part. The W-shaped component and the first connecting part and the second connecting part are located in the same plane.

6. The sound-generating vibration device according to claim 5, characterized in that: The number of the elastic members is four, and the four elastic members are evenly arranged at two ends of the shell.

7. The sound-generating vibration device according to claim 4, characterized in that: There are two elastic parts, and the two elastic parts are arranged on both sides of the first connecting part and the second connecting part; the elastic part includes a U-shaped connecting part and two vibration arms connected to the free ends of the U-shaped connecting part, one of the vibration arms is connected to the first connecting part, and the other vibration arm is connected to the second connecting part.

8. The sound-generating vibration device according to claim 7, characterized in that: Both ends of the yoke are provided with bending parts, and the bending parts include a first folded edge and a second folded edge connected in an L-shape, the first folded edge is vertically connected to the yoke, and the second folded edge is connected to the first connection part.

9. The sound-generating vibration device according to claim 8, characterized in that: The horizontal center line of the magnetic circuit system does not coincide with the horizontal center line of the elastic member.

10. An electronic device, characterized in that: The invention comprises a sound-generating vibration device as described in any one of claims 1 to 9.

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