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, it not only effectively reduces the overall thickness of the vibration motor and the sound-generating unit in the vibration direction, not only frees up space for optimizing the sound-generating unit, but also can effectively alleviate the shell vibration problem of the sound-generating vibration device, thereby improving the user experience.

Description

Technical Field

[0001] The invention belongs to the technical field of terminal equipment manufacturing, and in particular relates to a sound and 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, and the drive system is elastically connected to the housing;

[0008] A sound generating unit, the sound generating unit is arranged in the housing and comprises a vibration system matched with the magnetic circuit system; the vibration system is elastically connected to the housing and has the same vibration direction as the magnetic circuit system;

[0009] A limit assembly is provided between the magnetic circuit system and the side wall of the shell, and is suitable for limiting the vibration range of the polarization of the magnetic circuit system toward the side wall of the shell.

[0010] 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 setting of the limit assembly can effectively alleviate the polarization of the magnetic circuit assembly in the non-vibration direction, thereby improving the stability of the sound-generating vibration device.

[0011] In addition, the sound-generating vibration device according to the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, the magnetic circuit system also includes a yoke and 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 drive system includes a drive coil, and the drive coil is located outside the side magnets.

[0013] In some embodiments of the present invention, the magnetic circuit system further includes a first magnetic conductive plate and a second magnetic conductive plate, wherein the first magnetic conductive plate is disposed on the upper surface of the central magnet, and the number of the second magnetic conductive plates is two and they are disposed on the upper surfaces of the two side magnets.

[0014] In some embodiments of the present invention, the limiting assembly includes a first limiting portion provided at both ends of the first direction of the magnetic circuit system, the first limiting portion is adapted to limit the position of the shell, and is suitable for limiting the vibration range in the first direction; and / or, the limiting assembly includes a second limiting portion provided at both ends of the second direction of the magnetic circuit system, the second limiting portion is adapted to limit the position of the shell, and is suitable for limiting the vibration range in the second direction; the first direction and the second direction are perpendicular to the vibration direction.

[0015] In some embodiments of the present invention, the first limiting portion is a first protrusion disposed at both ends of the second magnetic conductive plate; the second limiting portion is a second protrusion disposed on the outer sides of the two second magnetic conductive plates respectively.

[0016] In some embodiments of the present invention, the first protrusion includes a first folding arm and a second folding arm connected in a V-shape, the free end of the first folding arm is connected to the second magnetic conductive plate, and the free end of the second folding arm is adapted to limit the side wall of the shell in the first direction.

[0017] In some embodiments of the present invention, a first extending portion is provided on the shell, and the first extending portion and the first limiting portion are adapted to limit the position.

[0018] In some embodiments of the present invention, the outer edge of the second folding arm is extended outwardly with the second protrusion, and the second protrusion is suitable for adapting and limiting with the side wall of the shell in the second direction.

[0019] In some embodiments of the present invention, the coil is disposed on a side wall of the housing in the second direction and is located between two of the second protrusions.

[0020] The present invention also discloses an electronic device, which comprises any one of the above-mentioned sound-generating vibration devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] 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;

[0023] Figure 2 for Figure 1 An exploded view of the sound-generating vibration device;

[0024] Figure 3 for Figure 2 A schematic diagram of the structure of the front side of the sound-generating vibration device;

[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0026] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure of the middle BB;

[0027] Figure 6 for Figure 2 Schematic diagram of the connection structure of the elastic member;

[0028] Figure 7 for Figure 2 A schematic diagram of the structure of the middle and lower shells of the middle shell;

[0029] Figure 8 for Figure 2 A schematic structural diagram of a second magnetic conductive plate;

[0030] Fig. 9 for Figure 2 A schematic diagram of the structure of the middle shell in the middle shell;

[0031] Fig.10 for Figure 2 Schematic diagram of the matching structure between the central magnetic circuit system and the shell;

[0032] Fig.11 for Figure 2 Schematic diagram of the matching structure of the central magnetic circuit system and the shell at another angle;

[0033] Fig.12 for Figure 2 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: first extension, 212: side magnet, 213: center magnet, 214: first magnetic conductive plate, 215: second magnetic conductive plate, 2151: first folded arm, 2152: second folded arm, 2153: second protrusion;

[0041] 22: driving coil;

[0042] 23: elastic member, 231: first connecting portion, 232: second connecting portion, 233: elastic portion;

[0043] 30: Shell;

[0044] 31: cover plate, 32: middle shell, 321: injection molded shell, 3211: first extension portion, 322: connecting insert, 3221: second extension portion, 33: lower shell, 331: boss, 332: protrusion, 34: first limit block, 35: second limit block, 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] Combination Figures 1 to 12 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 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 is parallel to that of the magnetic circuit system 21.

[0050] Specifically, Figure 4-5 As 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 is stacked on the top of the magnetic circuit system 21, and the vibration system 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, while making room for optimizing the sound-generating unit 10, 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, the magnetic circuit system 21 can vibrate synchronously with the vibration system 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.

[0051] Specifically, Figure 4 , Figure 5 and Fig.12As shown, in some embodiments of the present application, the vibration system 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.

[0052] 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.

[0053] Combination Figure 4 , Figure 5 and Fig.12 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.

[0054] Combination Figure 2 , Figure 5 , Fig.10 , 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.

[0055] 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 5 , Fig.10 , 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.

[0056] 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 the vibration system, and a second magnetic conductive plate 215 is further provided on the surface of the outer magnet facing the vibration system, 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.

[0057] 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.

[0058] 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.

[0059] 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 middle shell 32 includes an injection molded shell 321 located at both ends and a connecting insert 322 that spans the long axis and is 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 has a first extension portion 3211 extending inwardly, 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 has a second extension portion 3221 extending inwardly, 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 to 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 .

[0060] 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.

[0061] Recombination Fig.12As 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.

[0062] 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.

[0063] 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 centering support plates 12, which are arranged along two diagonal corners of the middle shell 32 and are respectively connected to the first extension part 3211 formed by extending inward from the diagonal corners of the middle shell 32, thereby further ensuring the support strength of the voice coil 113.

[0064] In some embodiments of the present application, a protrusion 332 is provided on the long axis side wall of the lower shell 33, and the driving coil 22 is installed and positioned through the protrusion 332, and a boss 331 suitable for connecting with the magnetic circuit system 21 is provided on the short axis side of the bottom wall. The driving coil 22 is energized through a flexible printed circuit board 36 provided at the bottom of the groove of the lower shell 33.

[0065] Combination Figure 2 , Figure 4 , Fig. 9 , Fig.10 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.

[0066] Combination Figure 6 As shown, in some embodiments of the present application, the elastic member 23 includes an elastic portion 233 and a first connecting portion 231 and a second connecting portion 232 respectively connected to both ends of the elastic portion 233 , the first connecting portion 231 is connected to the yoke 211 , and the second connecting portion 232 is connected to the lower shell 33 .

[0067] Specifically, the first connection part 231 is connected to the yoke 211 by welding, and the second connection part 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 part 232 with the bottom surface of the injection molded shell 321.

[0068] Combination Figure 6As shown, in some embodiments of the present application, the elastic portion 233 is a W-shaped member, one end of the W-shaped member extends outward to form a first connection portion 231 , and the other end of the W-shaped member extends outward to form a second connection portion 232 .

[0069] Specifically, the elastic member 23 is a planar structure, which includes a W-shaped member and a first connecting portion 231 and a second connecting portion 232 connected to both ends of the W-shaped member, and is suitable for ensuring the normal vibration process of the elastic member 23 through the deformation ability of the W-shaped member.

[0070] like Fig.10 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 .

[0071] In some embodiments of the present application, a limit component is further provided in the housing 30, and the limit component is provided on the magnetic circuit system 21, and is adapted to limit the polarization range of the magnetic circuit system 21 in the non-limited direction with the inner wall of the housing 30. Specifically, if the preset vibration direction of the magnetic circuit system 21 is a limited direction, then the non-limited direction is the polarization direction of the magnetic circuit system 21. By providing a limit component on the magnetic circuit system 21, the range of movement of the magnetic circuit system 21 in the non-limited direction in the housing 30 can be reduced, thereby reducing the polarization in the non-limited direction when the magnetic circuit system 21 vibrates, thereby improving the stability of the sound-generating vibration device 1.

[0072] In some embodiments of the present application, the limit assembly includes a first limit portion provided at both ends of the magnetic circuit system 21 in the first direction, the first limit portion is adapted to limit the position of the housing 30, and is suitable for limiting the vibration range in the first direction. In some embodiments of the present application, the limit assembly includes a second limit portion provided at both ends of the magnetic circuit system 21 in the second direction, the second limit portion is adapted to limit the position of the housing 30, and is suitable for limiting the vibration range in the second direction. The first direction and the second direction are perpendicular to the vibration direction.

[0073] Specifically, the first direction is the length direction of the sound-generating vibration device 1 , the second direction is the width direction of the sound-generating vibration device 1 , and the vibration direction is the height direction of the sound-generating unit 10 .

[0074] In some embodiments of the present application, the first limiting portion is a first protrusion disposed at both ends of the second magnetic conductive plate 215 ; the second limiting portion is a second protrusion 2153 respectively disposed on the outer sides of the two second magnetic conductive plates 215 .

[0075] Combination Figure 8 , Fig. 9 , Fig.10As shown, in some embodiments of the present application, the first protrusion includes a first folded arm 2151 and a second folded arm 2152 connected in a V-shape, the free end of the first folded arm 2151 is connected to the second magnetic conductive plate 215, and the free end of the second folded arm 2152 is adapted to limit the side wall of the shell 30 in the first direction. The first protrusion limits the activity space of the magnetic circuit system 21 on the long axis, thereby weakening the polarization of the magnetic circuit system 21 on the long axis and improving the stability of the sound-generating vibration device 1. In addition, the first protrusion of the V-shaped design and the second magnetic conductive plate 215 are an integrally formed structure, and the V-shaped tip faces the yoke 211, so the first protrusion has elastic deformation ability, which is arranged at the broken wall of the edge magnet 212 and the shell 30, and can buffer the impact force when the edge magnet 212 contacts the end wall of the shell 30 through deformation, thereby reducing the damage of polarization to the magnetic circuit system 21 and the shell 30.

[0076] In some embodiments of the present application, the housing 30 is provided with a first extension portion 3211, and the first extension portion 3211 is adapted to be limited in position with the second folding arm 2152. Specifically, the second folding arm 2152 is adapted to be limited in position with the end of the first extension portion 3211.

[0077] Combination Figure 7 , Figure 8 , Fig.11 As shown, in some embodiments of the present application, the outer edge of the second folded arm 2152 extends outwardly with a second protrusion 2153, and the second protrusion 2153 is suitable for adapting and limiting with the side wall in the second direction of the housing 30. Specifically, the outer edge of the second folded arm 2152 extends outwardly by a certain length to form the second protrusion 2153, and the second protrusion 2153 corresponds to the inner side of the long axis of the housing 30, so as to contact the housing 30 when the magnetic circuit system 21 vibrates toward the long axis side of the housing 30 to limit the vibration range of the magnetic circuit system 21.

[0078] In some embodiments of the present application, the coil is disposed on the side wall of the housing 30 in the second direction and between the two second protrusions 2153. Placing the coil between the two second protrusions 2153 can further reduce the probability of being vibrated and squeezed by the magnetic circuit system 21, thereby protecting the coil and ensuring the stability of the vibration motor 20.

[0079] Combination Figure 4As shown, in some embodiments of the present application, a limiting structure is also provided above and below the yoke 211 to limit the vibration range of the magnetic circuit system 21 in the vibration direction. Specifically, a first limiting block 34 is provided above the yoke 211, and the first limiting block 34 is provided on the lower surface of the second extension portion 3221 formed by extending inward from the end of the connecting insert 322 on the middle shell 32, and is suitable for contacting with the upper surface of the first extension portion 2111 at the end of the yoke 211; a second limiting block 35 is provided below the yoke 211, and the second limiting block 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.

[0080] 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.

[0081] 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: case; 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, and the magnetic circuit system is elastically connected to the housing; A sound generating unit, the sound generating unit is arranged in the housing and comprises a vibration system matched with the magnetic circuit system; the vibration system is elastically connected to the housing and has the same vibration direction as the magnetic circuit system; A limit assembly, the limit assembly is arranged between the magnetic circuit system and the side wall of the shell, and is suitable for limiting the vibration range of the polarization of the magnetic circuit system toward the side wall of the shell; The limiting assembly comprises first limiting parts provided at two ends of the magnetic circuit system in the first direction, the first limiting parts are adapted to limit the position of the housing, and are suitable for limiting the vibration range in the first direction; and / or The limiting assembly comprises second limiting parts arranged at two ends of the magnetic circuit system in the second direction, the second limiting parts are adapted to limit the position of the housing, and are suitable for limiting the vibration range in the second direction; The first direction and the second direction are perpendicular to the vibration direction in pairs; The magnetic circuit system includes a yoke, and side magnets and a center magnet disposed on the yoke, wherein a magnetic gap is formed between the side magnets and the center magnet; A second magnetic conductive plate is disposed on the upper surface of the edge magnet, and the first limiting portion and the second limiting portion are both disposed on the second magnetic conductive plate.

2. The sound-generating vibration device according to claim 1, characterized in that: The vibration system includes a voice coil inserted into the magnetic gap; the driving system includes a driving coil located outside the side magnet.

3. The sound-generating vibration device according to claim 2, characterized in that: The magnetic circuit system further includes a first magnetic conductive plate, which is arranged on the upper surface of the central magnet.

4. The sound-generating vibration device according to claim 3, characterized in that: The first limiting portion is a first protrusion disposed at two ends of the second magnetic conductive plate; the second limiting portion is a second protrusion disposed respectively on the outer sides of the two second magnetic conductive plates.

5. The sound-generating vibration device according to claim 4, characterized in that: The first protrusion includes a first folding arm and a second folding arm connected in a V-shape, the free end of the first folding arm is connected to the second magnetic conductive plate, and the free end of the second folding arm is adapted to limit the side wall of the shell in the first direction.

6. The sound-generating vibration device according to claim 3, characterized in that: The shell is provided with a first extending portion, and the first extending portion and the first limiting portion are adapted to limit position.

7. The sound-generating vibration device according to claim 5, characterized in that: The second protrusion is extended outwardly from the outer edge of the second folding arm, and the second protrusion is suitable for matching and limiting with the side wall of the shell in the second direction.

8. The sound-generating vibration device according to claim 4, characterized in that: The coil is arranged on the side wall of the housing in the second direction and is located between the two second protrusions.

9. An electronic device, characterized in that: The invention comprises a sound-generating vibration device as described in any one of claims 1 to 7.

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