CN116647795A - Vibration sounding device and electronic equipment - Google Patents

Abstract

The invention discloses a vibration sound generating device and electronic equipment, wherein the vibration sound generating device comprises a sound generating unit and a vibration unit which are stacked, the sound generating unit comprises a vibration system and a magnetic circuit system, the magnetic circuit system comprises two magnetic assemblies which are arranged along a first direction and are arranged at intervals to form a magnetic gap, the vibration system comprises a vibrating diaphragm and a voice coil which drives the vibrating diaphragm to vibrate, the voice coil is flat and is arranged in the magnetic gap, the axial direction of the voice coil is parallel to the first direction, and the vibration direction of the vibrating diaphragm is perpendicular to the axial direction of the voice coil; the vibrating unit comprises a shell, a stator, a vibrator and an elastic piece connected with the vibrator and the shell, the vibrating unit and the sounding unit are stacked along the vibrating direction of the vibrating diaphragm, the stator is a coil fixed on the shell, the vibrator comprises a permanent magnet, the permanent magnet is opposite to the coil and is located on one side of the coil, close to the sounding unit, the vibrator vibrates along a second direction, and the second direction is perpendicular to the vibrating direction and the first direction.

Description

Vibration sounding device and electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a vibration sounding device and electronic equipment using the same.

Background

The intelligent electronic equipment, especially mobile phone products, generally need to have the audio frequency experience and the vibration touch experience function, the audio frequency experience comes from the loudspeaker device, the touch vibration experience comes from the motor device, the loudspeaker device and the motor device are respectively and independently arranged in the process of improving the user audio frequency and the vibration touch experience in the related technology, so that the intelligent electronic equipment is large in occupied space and the layout effect is not ideal, and the user experience of the intelligent terminal is influenced.

Disclosure of Invention

The invention mainly aims to provide a vibration sounding device and electronic equipment, and aims to provide the vibration sounding device which integrates a sounding unit and a vibration unit into a whole, so that the occupation of the internal space of the electronic equipment can be effectively reduced, and the utilization rate of the internal space of the electronic equipment is improved.

In order to achieve the above object, the present invention provides a vibration sound generating apparatus including:

the sound generating unit comprises a vibration system and a magnetic circuit system, wherein the magnetic circuit system comprises two magnetic assemblies which are distributed along a first direction and are arranged at intervals to form a magnetic gap, the vibration system comprises a vibrating diaphragm and a voice coil which drives the vibrating diaphragm to vibrate, the voice coil is flat and is arranged in the magnetic gap, the axial direction of the voice coil is parallel to the first direction, and the vibration direction of the vibrating diaphragm is perpendicular to the axial direction of the voice coil;

The vibrating unit comprises a shell, a stator arranged in the shell, a vibrator and an elastic piece for connecting the vibrator and the shell, and the vibrating unit and the sounding unit are stacked along the vibrating direction of the vibrating diaphragm; wherein,,

the stator is fixed in the coil of shell, the oscillator includes the mass block and locates the permanent magnet of mass block, the permanent magnet is the halbach array of arranging along the second direction, halbach array has magnetic field enhancement side and magnetic field weakening side, magnetic field enhancement side is towards the coil, magnetic field weakening side is towards sound generating unit, the oscillator vibrates along the second direction, the second direction perpendicular to the vibration direction of vibrating diaphragm with first direction.

In one embodiment, the vibration sound generating device has a width along the first direction and a length along the second direction, wherein the length is equal to or greater than 1.5.

In an embodiment, the vibration unit includes a limiting member for limiting a vibration stroke of the vibrator in the second direction.

In one embodiment, the mass includes a middle portion and end portions at both ends of the middle portion, the end portions protruding toward a side close to the coil with respect to the middle portion, the coil being located between the two end portions, and the stopper being located between the coil and the end portions.

In an embodiment, a first groove is formed in the surface, facing the coil, of the middle portion, and the permanent magnet is embedded in the first groove.

In an embodiment, the housing, the mass block and the elastic member are all made of metal, and the elastic member is welded and fixed with the mass block or the elastic member is welded and fixed with the housing.

In an embodiment, the number of the limiting parts is two, and the two limiting parts are respectively located at two sides of the coil along the second direction.

In an embodiment, the limiting member comprises a planar plate and a vertical plate disposed at an angle to the planar plate, and the vertical plate is disposed on a side of the planar plate away from the coil.

In an embodiment, a buffer block is further arranged on one side, away from the coil, of the limiting piece, and the buffer block is made of foam or silica gel.

In an embodiment, the permanent magnet is a halbach array, and includes a middle magnet and outer magnets disposed on two sides of the middle magnet, wherein the middle magnet is magnetized along the vibration direction of the vibrating diaphragm, and the two outer magnets are magnetized along the second direction and have opposite magnetizing directions;

the number of the coils is two, the two coils are arranged along the second direction, and the two coils and the permanent magnet are oppositely arranged.

In an embodiment, the vibrator further includes a first magnetic conductive plate, and the first magnetic conductive plate is disposed on a side of the permanent magnet away from the coil.

In an embodiment, along the second direction, the two coils include adjacent first coil sections and second coil sections opposite to the first coil sections respectively, the current directions of the two coils are opposite, the adjacent two first coil sections jointly correspond to the intermediate magnet, and the two second coil sections respectively correspond to the outer magnet.

In an embodiment, along the vibration direction of the diaphragm, portions of the two second coil sections are opposite to the outer magnet and are located at the outer side of the outer magnet; along the second direction, the distance between the edge of the middle magnet, which is close to the outer magnet, and the inner edge of the second coil section is A, the distance between the outer edge of the outer magnet, which is far away from the middle magnet, and the outer edge of the second coil section is B, and the maximum amplitude of the vibrator along the second direction is Xmax, A > Xmax, and B > Xmax.

In an embodiment, the intermediate magnet, the outer magnet and the coil are each elongated, and the first coil section and the second coil section are long axis sections of the coil.

In an embodiment, the number of the elastic members is two, the elastic members are respectively arranged at two ends of the vibrator along the second direction, the elastic members comprise connecting portions at two ends and a middle deformation portion, one connecting portion is fixed with the vibrator, the other connecting portion is fixed with the housing, and the deformation portion extends from one connecting portion to the other connecting portion around the vibrator.

In an embodiment, each magnetic assembly includes a second magnetic conductive plate, and a first magnet and a second magnet sequentially disposed on one side of the second magnetic conductive plate away from the diaphragm, where the first magnet magnetizes along the vibration direction of the diaphragm, the magnetization direction of the second magnet is perpendicular to the vibration direction of the diaphragm, and a magnetic pole of one end of the second magnet near the magnetic gap is opposite to a magnetic pole of one end of the first magnet near the second magnetic conductive plate;

the magnetizing directions of the two opposite first magnets of the two magnetic assemblies are opposite, and the magnetizing directions of the two opposite second magnets are the same.

The invention also provides electronic equipment, which comprises an equipment shell and the vibration sounding device, wherein the vibration sounding device is arranged in the equipment shell.

According to the vibration sounding device, the sounding unit adopts the flat voice coil, the two magnetic assemblies forming the magnetic gap are respectively positioned at two sides of the voice coil, and compared with the annular voice coil and the magnetic circuit structure forming the annular magnetic gap in the prior art, the vibration sounding device has higher magnetic circuit utilization rate, so that the voice coil can obtain larger driving force. Compared with the traditional independent devices of the sounding unit and the vibration unit, the sound generating unit and the vibration unit are innovatively integrated, the occupation of the internal space of the electronic equipment can be effectively reduced, and the utilization rate of the internal space of the electronic equipment is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 (a) is a schematic diagram of a vibration sound generating apparatus according to the present invention;

FIG. 1 (b) is a schematic view of a vibration sound device according to another embodiment of the present invention;

FIG. 2 is a schematic diagram showing the separation of a sound unit and a vibration unit of a vibration sound device according to the present invention;

FIG. 3 is a schematic cross-sectional view of a sound unit of a vibration sound device according to the present invention;

FIG. 4 is an exploded view of a sound unit of a vibration sound device according to the present invention;

FIG. 5 is a schematic cross-sectional view of a vibration sound producing device according to the present invention;

FIG. 6 is a magnetic field distribution diagram of a vibration sound producing device of the present invention;

FIG. 7 is an exploded view of a part of the sound unit of the vibration sound device of the present invention;

FIG. 8 (a) is an exploded view of a part of the sound unit of the vibration sound device of the present invention;

FIG. 8 (b) is a schematic diagram of the structural assembly of FIG. 8 (a);

FIG. 9 is a schematic view of the structure of the reinforcement part of the sound unit of the vibration sound device according to the present invention at different angles;

FIG. 10 is a schematic diagram of a frame of a sound unit of a vibration sound device according to the present invention;

FIG. 11 is a schematic cross-sectional view of a diaphragm of a sound unit of a vibration sound device according to the present invention;

FIG. 12 is a schematic diagram of a plastic housing and magnetic assembly of a sound unit of a vibration sound device according to the present invention;

FIG. 13 is a schematic diagram showing the separation of a plastic housing and a second magnetic conductive plate of a sound unit of a vibration sound device according to the present invention;

FIG. 14 (a) is a schematic view of a part of the structure of a sound unit of a vibration sound device according to the present invention;

fig. 14 (b) is an exploded view of the structure of fig. 14 (a);

FIG. 15 (a) is a schematic diagram showing the structure of a vibration unit of the vibration sound generating apparatus of the present invention;

fig. 15 (b) is a schematic structural view of a vibration unit of the vibration sound generating apparatus of the present invention;

FIG. 16 is a schematic diagram showing the separation of the housing, vibrator, and stator of the vibration unit of the vibration sound device of the present invention;

FIG. 17 is an exploded view of a vibration unit of a vibration sound emitting device of the present invention;

FIG. 18 (a) is a top view of a vibration unit of a vibration sound emitting device of the present invention;

FIG. 18 (b) is a schematic cross-sectional view of the vibration unit of FIG. 18 (a) along A-A;

FIG. 19 (a) is a schematic view showing the structure of the vibration unit of the vibration sound generating apparatus of the present invention with the bottom plate removed;

FIG. 19 (B) is a schematic cross-sectional view of the vibration unit of FIG. 19 (a) along B-B;

FIG. 20 (a) is a schematic cross-sectional view of a vibration sound producing device according to the present invention;

FIG. 20 (b) is a top view of a vibration unit of a vibration sound emitting device of the present invention;

FIG. 21 (a) is a top view of a vibration sound emitting device of the present invention;

FIG. 21 (b) is a schematic cross-sectional view of the vibration sound device of FIG. 21 (a) along line C-C;

FIG. 21 (C) is a schematic cross-sectional view of the vibration sound device of FIG. 21 (a) along line C-C;

FIG. 22 is a magnetic field distribution diagram of a vibratory unit of a vibratory sound device of the present invention;

FIG. 23 is a schematic view showing the positions of a plastic housing and an FPCB of the vibration sound emitting device of the present invention;

fig. 24 is a schematic diagram showing a combination of a part of a vibration unit and an FPCB of the vibration sound emitting device according to the present invention;

fig. 25 (a) is a schematic structural view of an FPCB of the vibration sound emitting device according to the present invention;

fig. 25 (b) is a schematic structural view of an FPCB of the vibration sound emitting device according to the present invention;

fig. 26 is a schematic structural view of an FPCB according to another embodiment of the vibration sound emitting device of the present invention;

fig. 27 is a perspective view of an electronic device in the present invention.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Electronic equipment generally needs to have audio experience and vibrotactile experience functions, the audio experience comes from a loudspeaker device, the tactile vibration experience comes from a motor device, and related technologies generally set the loudspeaker device and the motor device respectively and independently, so that occupied space in the electronic equipment is large, and particularly the battery size is greatly influenced, the service time of the electronic equipment is finally influenced, and further the user experience is influenced.

Based on the above-mentioned problem, this scheme provides a vibration sound production device 100, innovatively integrates speaker and motor together, compares in traditional speaker and motor independent device respectively, can effectively reduce the occupation to electronic equipment inner space, promotes electronic equipment inner space utilization. The electronic device in this embodiment may be a portable mobile electronic product such as a mobile phone or an IPAD, or a wearable device such as a wristwatch, VR, AR, etc., which is not limited herein.

Referring to fig. 1 to 27 in combination, in the embodiment of the present invention, a vibration sound generating apparatus 100 includes a sound generating unit 1 and a vibration unit 2, the sound generating unit 1 includes a vibration system 11 and a magnetic circuit 12, the magnetic circuit 12 includes two magnetic components arranged along a first direction and spaced apart to form a magnetic gap, the vibration system 11 includes a diaphragm 111 and a voice coil 112, the voice coil 112 is disposed in the magnetic gap and drives the diaphragm 111 to vibrate, the voice coil 112 is flat, an axial direction of the voice coil 112 is parallel to the first direction, and a vibration direction of the diaphragm 111 is perpendicular to an axial direction of the voice coil 112; the vibration unit 2 includes a housing 21, a stator provided in the housing 21, a vibrator 23, and an elastic member 24 connecting the vibrator 23 and the housing 21, and the vibration unit 2 and the sound generating unit 1 are stacked along the vibration direction of the diaphragm 111.

The sound generating unit 1 of the vibration sound generating device 100 adopts the flat voice coil 112, two magnetic components forming the magnetic gap are respectively positioned at two sides of the voice coil 112, and compared with the annular voice coil 112 and a magnetic circuit structure forming the annular magnetic gap in the prior art, the vibration sound generating device has higher magnetic circuit utilization rate, so that the voice coil 112 can obtain larger driving force. According to the vibration sounding apparatus 100, the sounding unit 1 and the vibration unit 2 are innovatively integrated together, and compared with the traditional separate devices of the sounding unit 1 and the vibration unit 2, the occupation of the internal space of the electronic equipment can be effectively reduced, and the internal space utilization rate of the electronic equipment is improved.

In this embodiment, the stator is a coil 22 fixed to the housing 21, the vibrator 23 includes a mass 232 and a permanent magnet 231 provided to the mass 232, and the permanent magnet 231 may be halbach array magnets arranged in the second direction and having a magnetic field enhancing side facing the coil 22 and a magnetic field weakening side facing the sound generating unit 1. Thus, the use of the magnet can be reduced while realizing a stronger magnetic field, and the manufacturing cost is reduced. Meanwhile, the magnetic field is concentrated mainly on the side facing the coil 22, and the influence on the magnetic circuit system 12 of the sound generating unit 1 can be reduced.

In the embodiment of the present invention, the vibrator 23 vibrates in a second direction, which is perpendicular to the vibration direction of the diaphragm 111 and the first direction. That is, the vibration unit 2 adopts a linear vibration structure, and compared with a rotor motor structure, the device has the advantages of shorter starting and stopping time, stronger vibration feeling and easier control, and can promote the use experience of users.

As one embodiment, the vibration sound emitting device 100 has a width in the first direction and a length in the second direction, and the length is greater than the width. The length of the vibration sound generating device 100 of this scheme is greater than the width, and vibration sound generating device 100 has long and narrow structure promptly, when being applied to electronic equipment, can match electronic equipment's space better.

Preferably, the ratio of the length to the width of the vibration sound emitting device 100 is 1.5 or more: 1, i.e. the value of length/width may be 5, 4, 3, 2.5, 2, 1.5, etc., which may match the thickness space of different electronic devices. It can be appreciated that the ratio of the length to the width of the vibration/sound device 100 may be 1.2:1, etc., and in practical application, the size of the vibration/sound device 100 is flexibly adjusted according to the reserved space of the electronic device, which is not limited herein.

In an embodiment, the vibration unit 2 includes a limiting member 26, and the limiting member 26 is used for limiting the vibration travel of the vibrator 23 along the second direction, so as to further improve the vibration reliability of the vibration unit 2.

As shown in fig. 15 to 21, the housing 21 has an accommodating space in which the stator, the vibrator 23, the stopper 26, and the elastic member 24 are accommodated. The housing 21 may be made of metal, and the housing 21 made of metal may be thinner, so as to reduce the size of the vibration unit 2 and further reduce the occupation of the space of the electronic device. The mass block 232 may be made of metal, such as tungsten steel, so as to improve the quality of the vibrator 23 and further improve the shock feeling. Specifically, mass 232 includes a middle portion 2321 and end portions 2322 located at both ends of middle portion 2321, both end portions 2322 protruding toward a side close to coil 22 with respect to middle portion 2321, coil 22 is located between both end portions 2322, and stopper 26 is located between coil 22 and end portions 2322. That is, the limiting member 26 is located inside the mass block 232 and does not interfere with the elastic member 24, so that the design of the elastic member 24 can be released, the deformation portion 242 of the elastic member 24 can be made wider or longer, and the strength of the elastic member 24 is improved.

In this embodiment, the number of the two limiting members 26 may be two, the two limiting members 26 are located at two sides of the coil 22 along the second direction, and the two limiting members 26 are provided to better limit the vibration stroke of the vibrator 23 without affecting the vibration stability thereof. Specifically, the limiting piece 26 comprises a plane plate and a vertical plate which is arranged at an included angle with the plane plate, the vertical plate is arranged on one side, far away from the coil 22, of the plane plate, occupation of the limiting piece 26 on the volume of the vibration unit 2 is reduced, and vibration amplitude of the vibrator 23 is guaranteed.

Optionally, a buffer block 27 is further disposed on a side of the limiting member 26 away from the coil 22, and the buffer block 27 is made of foam or silica gel. The buffer member can buffer the impact of the vibrator 23 and the stopper 26 during collision, and improve the vibration performance of the vibration unit 2. Specifically, the cushioning member is attached to a side of the vertical plate away from the coil 22.

As shown in fig. 17 to 19, the vibration unit 2 is provided with two elastic members 24, the two elastic members 24 are respectively provided at both ends of the vibrator 23 in the second direction, the elastic members 24 include connection portions 241 at both ends and a deformed portion 242 in the middle, one connection portion 241 is fixed to the vibrator 23, the other connection portion 241 is fixed to the housing 21, and the deformed portion 242 extends from one connection portion 241 around the vibrator 23 to the other connection portion 241.

In this embodiment, the elastic member 24 may be made of metal, such as stainless steel. The elastic member 24 is generally of a C-shaped structure, and the middle deformation portion 242 extends around the vibrator 23, so that the size of the deformation portion 242 is effectively prolonged, the deformation performance of the elastic member 24 is improved, and the fatigue resistance of the elastic member is further improved. In this embodiment, the two elastic members 24 are disposed at two ends of the vibrator 23, so that the vibrator 23 can be better supported, and the middle deformation portion 242 of the elastic member 24 extends around the vibrator 23, so that the deformation performance of the elastic member 24 can be improved, the fatigue resistance of the elastic member is improved, and the service life of the elastic member 24 is prolonged. It should be noted that the elastic member 24 may have other arrangements, which are not limited herein.

In an embodiment, the housing 21, the mass block 232 and the elastic member 24 are all made of metal, the elastic member 24 and the mass block 232 are welded and fixed, and the elastic member 24 and the housing 21 are welded and fixed, so as to improve the connection stability of the elastic member 24.

Further, the vibration unit 2 further includes a clamp 25, the clamp 25 is connected to a connection portion 241, the connection portion 241 is provided between the clamp 25 and the housing 21, and the connection portion 241 is provided between the clamp 25 and the vibrator 23. Specifically, the clamping member 25 has a block structure, and the clamping member 25 is used for clamping connection firmness between the connecting portion 241 and the vibrator 23 or the housing 21.

As a specific embodiment, the housing 21, the mass block 232, the elastic member 24 and the clamping member 25 are all made of metal, the elastic member 24 and the mass block 232 are welded and fixed, and the elastic member 24 and the housing 21 are welded and fixed. Further, the clamping member 25 is welded and fixed with the mass block 232, that is, the clamping member 25, the elastic member 24 and the mass block 232 are welded and fixed at the same time, and the clamping member 25 clamps a connecting portion 241 on the mass block 232; the clamping member 25 is welded and fixed with the housing 21, that is, the clamping member 25, the elastic member 24 and the housing 21 are welded and fixed at the same time, and the clamping member 25 clamps the other connecting portion 241 on the housing 21. By this arrangement, the connection between the elastic member 24 and the vibrator 23 or between the elastic member 24 and the housing 21 can be made more firm, and the reliability of the vibration unit 2 can be further improved.

As one embodiment, as shown in fig. 17 to 22, the halbach array includes a middle magnet 2311 and outer magnets 2312 disposed on both sides of the middle magnet 2311, the middle magnet 2311 is magnetized in the vibration direction of the diaphragm 111, the two outer magnets 2312 are magnetized in the second direction and the magnetizing directions are opposite, the two coils 22 are arranged in the second direction, and the two coils 22 are disposed opposite to the permanent magnet 231. It will be appreciated that the permanent magnet 231 may also comprise more magnets, and the vibration unit 2 is correspondingly provided with more coils 22, so as to ensure that the vibrator 23 vibrates in cooperation.

In the present embodiment, as shown in fig. 21 (b) and 21 (c), the two coils 22 include adjacent first coil segments 221 and second coil segments 222 respectively opposing the first coil segments 221, that is, the two first coil segments 221 are adjacent and located between the two second coil segments 222, and the current directions of the two coils 22 are opposite. By this arrangement, the vibration performance of the vibration unit 2 can be made better and the structure can be made more compact.

In the present embodiment, two adjacent first coil segments 221 correspond to the intermediate magnet 2311 in common, and two second coil segments 222 correspond to the outer magnets 2312, respectively. Specifically, in the mounted state, the orthographic projections of the two first coil segments 221 toward the bottom surface of the intermediate magnet 2311 all fall on the bottom surface of the intermediate magnet 2311, and the orthographic projections of the two second coil segments 222 on the plane of the bottom surface of the outer magnet 2312 at least partially fall on the bottom surface of the outer magnet 2312. Thus, the coil 22 is more compact in structure, and the magnetic field can be fully utilized to reduce the size of the vibration unit 2.

As one embodiment, along the vibration direction of the diaphragm 111, portions of the two second coil sections 222 are opposite to the outer magnet 2312 and are partially located outside the outer magnet body 2312; in the second direction, the edge of the intermediate magnet 2311 near the outer magnet 2312 is a distance a from the inner edge of the second coil section 222, the outer edge of the outer magnet 2312 away from the intermediate magnet 2311 is a distance B from the outer edge of the second coil section 222, and the maximum amplitude of the vibrator 23 in the second direction is Xmax, a > Xmax, B > Xmax.

As will be appreciated, the first coil section 221 and the second coil section 222 are arranged in the second direction so as to cooperate with the permanent magnets 231 to vibrate the vibrator 23 in the second direction. In the vibration direction of the voice coil 112, the distance of the outer edge of the intermediate magnet 2311 from the inner edge of the second coil section 222 and the distance of the outer edge of the outer magnet 2312 from the outer edge of the second coil section 222 are both larger than the maximum amplitude of the vibrator 23 in the second direction. By this arrangement, it is ensured that during the vibration of the vibrator 23, the at least one first coil segment 221 is opposite to the middle magnet 2311 and the at least one second coil segment 222 is opposite to the outer magnet 2312, so that the coil 22 is always located in a region with concentrated magnetic force lines, and the vibration stability of the vibrator 23 is ensured.

In the present embodiment, as shown in fig. 17, 18, and 21, each of the intermediate magnet 2311, the outer magnet 2312, and the coil 22 has a long shape, and the first coil segment 221 and the second coil segment 222 are long-axis segments of the coil 22. This allows the vibrator 23 to receive the maximum driving force in the second direction, ensuring the vibration performance of the vibration unit 2.

In an embodiment, the side of the permanent magnet 231 away from the coil 22 may further be provided with a first magnetic conductive plate 233, and the first magnetic conductive plate 233 is embedded in the mass 232. The side that the permanent magnet 231 kept away from coil 22 sets up first magnetic conduction board 233, can effectively assemble the magnetic line of force of the side that the permanent magnet 231 kept away from coil 22, can avoid the magnetic field to reveal, strengthen the magnetic field of vibration unit 2, avoid the magnetic field of vibration unit 2 to interfere with the magnetic field of sound generating unit 1 simultaneously, avoid vibrator 23 to receive the influence of the magnetic field of sound generating unit 1 to inhale or repel with the magnetic component of sound generating unit 1, be favorable to promoting the stability of the resonance frequency point of vibration unit 2, promote its vibrations reliability.

In an embodiment, as shown in fig. 17 to 21, a surface of the mass block 232 facing the coil 22 is provided with a first groove 23211, and the permanent magnet 231 is embedded in the first groove 23211. The permanent magnet 231 is embedded in the first groove 23211, so that the thickness of the vibrator 23 can be reduced, the thickness of the vibration unit 2 can be further reduced, the thin design of the vibration unit 2 is facilitated, the thickness of the vibration sound generating device 100 can be further reduced, and the occupied volume of electronic equipment can be reduced.

In this embodiment, a surface of the middle portion 2321 of the mass 232 facing the coil 22 is provided with a first groove 23211, and the permanent magnet 231 is embedded in the first groove 23211.

In an embodiment, as shown in fig. 3 to 6, each magnetic assembly includes a second magnetic conductive plate 121, and a first magnet 122 and a second magnet 123 sequentially disposed on one side of the second magnetic conductive plate 121 away from the diaphragm 111, where the first magnet 122 magnetizes along the vibration direction of the diaphragm 111, the magnetization direction of the second magnet 123 is perpendicular to the vibration direction of the diaphragm 111, the magnetic pole of one end of the second magnet 123 near the magnetic gap is opposite to the magnetic pole of one end of the first magnet 122 near the second magnetic conductive plate 121, the magnetization directions of two opposite first magnets 122 of the two magnetic assemblies are opposite, and the magnetization directions of two opposite second magnets 123 are the same. So arranged, a first magnetic gap is formed between the two second magnetic conductive plates 121, a second magnetic gap is formed between the two second magnets 123, the voice coil 112 has a first wire section near the diaphragm 111 in the vibration direction of the diaphragm 111 and a second wire section far from the diaphragm 111, the first wire section is located in the first magnetic gap, and the second wire section is located in the second magnetic gap. With this arrangement, the utilization ratio of the magnetic circuit system 12 is higher, a larger driving force can be obtained by the flat voice coil 112, and interference with the magnetic field of the vibration unit 2 is reduced.

In one embodiment, as shown in fig. 21, the voice coil 112 is elongated, and the length direction of the voice coil 112 is along the second direction. I.e. the long side of the sound generating unit 1 and the long side of the vibration unit 2 are correspondingly arranged, which is beneficial to the integrated arrangement of the sound generating unit 1 and the vibration unit 2.

As shown in fig. 2 and 21, the vibration unit 2 and the sound generating unit 1 are stacked in the vibration direction of the diaphragm 111, and the permanent magnet 231 is located on the side of the coil 22 close to the sound generating unit 1. Specifically, the vibration unit 2 is stacked below the sound generating unit 1, and the housing 21 of the vibration unit 2 supports the magnetic assembly of the sound generating unit 1. So can assemble the spare part of sound unit 1 and vibration unit 2 respectively, later will be two again integrated, promote production efficiency. And the shell 21 of the vibration unit 2 can also support the magnetic component of the sound generating unit 1 to provide the stability of the whole product structure.

In this embodiment, the housing 21 is provided with a dodging through hole 210 facing the magnetic gap, and the dimension of the dodging through hole 210 is larger than the dimension of the projection of the voice coil 112 along the vibration direction. The avoidance through holes 210 are used for increasing the lower vibration space of the voice coil 112, and the thickness of the sounding unit 1 can be reduced due to the avoidance through holes 210, so that the thinning design of the vibration sounding device 100 is facilitated.

Specifically, the housing 21 includes a bottom plate 211 and side plates 212 connected to the periphery of the bottom plate 211, and two side plates 212 disposed opposite to each other are bent and extended toward the inside of the housing to form a support plate 213, and the magnetic assembly of the sound generating unit 1 is disposed on the support plate 213, and the two support plates 213 are spaced apart and the interval therebetween forms an avoidance through hole 210.

Optionally, a second groove 23212 is disposed on a surface of the mass block 232 facing away from the coil 22, the second groove 23212 is opposite to the avoidance hole 210, a size of the second groove 23212 is greater than a projected size of the voice coil 112 along the vibration direction, and the second groove 23212 is used to further increase a lower vibration space of the voice coil 112. In this way, the thickness dimension of the sound generating unit 1 can be further reduced, the dimension of the vibration sound generating apparatus 100 can be reduced, and the occupation of the internal space of the electronic apparatus can be reduced.

As shown in fig. 3 to 7, the sound generating unit 1 further includes an auxiliary housing 13, and the vibration system 11 and the auxiliary system are both fixed to the auxiliary housing 13, and the auxiliary housing 13 is fixedly connected with the housing 21 of the vibration unit 2. In this embodiment, the auxiliary housing 13 includes an annular bracket 131, the diaphragm 111 is bonded to an inner peripheral wall of the annular bracket 131, and the diaphragm 111 is integrally injection molded or heat-pressed with the annular bracket 131.

As one embodiment, the annular bracket 131 is made of plastic, and the diaphragm 111 includes a diaphragm body 1111 and a reinforcing portion 1112, and the reinforcing portion 1112 is disposed in a central region of the diaphragm body 1111. The vibrating diaphragm body 1111 can be integrally formed with the annular bracket 131 by adopting liquid silicone rubber through an injection molding process, the annular bracket 131 is arranged in a mold as an insert, then the liquid silicone rubber is injected into the mold to form the vibrating diaphragm body 1111, and the liquid silicone rubber is combined with the annular bracket 131 in the process of injecting the liquid silicone rubber, so that the liquid silicone rubber and the annular bracket 131 are connected. Alternatively, the diaphragm body 1111 is integrally formed with the ring bracket 131 by a hot pressing process using one of solid silicon rubber, AEM rubber, or ACM rubber.

In this embodiment, the diaphragm 111 and the annular bracket 131 are integrally formed, so that the connection stability of the diaphragm 111 and the annular bracket 131 can be improved, and no glue is required between the diaphragm 111 and the annular bracket 131, so that the high-level waterproof requirement of electronic equipment such as a smart watch can be met.

Optionally, the sound generating unit 1 further includes a waterproof sealing ring 115, the waterproof sealing ring 115 is combined with the peripheral wall of the annular bracket 131, and the annular bracket 131 and the waterproof sealing ring 115 are in an integrated structure. Specifically, the waterproof sealing ring 115 may be integrally formed with the annular bracket 131 by using liquid silicone rubber through an injection molding process; alternatively, the waterproof gasket 115 is formed integrally with the ring bracket 131 by a hot pressing process using one of solid silicone rubber, AEM rubber, or ACM rubber. Further, after the waterproof sealing ring 115 and the annular bracket 131 are integrally formed, the diaphragm body 1111 is combined with the annular bracket 131 through a hot pressing process, and the diaphragm 111, the annular bracket 131 and the waterproof sealing ring 115 are integrally formed. The combined ring bracket 131 has a higher waterproof level.

In one embodiment, as shown in fig. 4, 8, 10 and 14, the vibration system 11 further includes a frame 113, the frame 113 connects the diaphragm 111 and the voice coil 112, the voice coil 112 includes two long axis sides 1121 spaced along the vibration direction and a short axis side 1122 connecting the two long axis sides 1121, and the frame 113 is two and distributed at two ends of the voice coil 112 along the direction of the long axis sides 1121. It will be appreciated that the two long axis sides 1121 are the first wire segment and the second wire segment, respectively. By connecting the diaphragm 111 and the voice coil 112 through the bobbin 113, the height design of the voice coil 112 can be released, while facilitating adjustment of the position of the voice coil 112 in the magnetic gap. The frame 113 may be made of metal, such as aluminum or aluminum magnesium alloy, so as to improve the strength of the frame 113 and facilitate heat dissipation.

In this embodiment, the vibration system 11 further includes two conductive support plates 114, the conductive support plates 114 are distributed at two ends of the voice coil 112 corresponding to the frame 113, the conductive support plates 114 include a first fixing portion 1141, a cantilever 1142 and a second fixing portion 1143, which are sequentially connected, the first fixing portion 1141 is connected to one end of the frame 113 away from the diaphragm 111, and the second fixing portion 1143 is connected to the auxiliary housing 13. The conductive support 114 can realize the centering function of the voice coil 112 during the vibration process of the voice coil 112, so as to prevent the voice coil 112 from generating oblique vibration and polarization. Meanwhile, the voice coil 112 is electrically connected with an external circuit through the conductive support sheet 114, so that the voice coil 112 is prevented from being led out too long, the mutual interference of the lead and other parts in the vibration process is avoided, and the risk of lead short wire is also avoided.

Specifically, the first fixing portion 1141 of the conductive support 114 is provided with a first pad 11411, the second fixing portion 1143 is provided with a second pad 11431, the lead wire of the voice coil 112 is connected to the first pad 11411, and the second pad 11431 is connected to the conductive terminal 1332 of the auxiliary case 13.

In this embodiment, the frame 113 includes a first connection portion 1131 connected to the diaphragm 111, a second connection portion 1132 bent and extended from the first connection portion 1131 toward the voice coil 112, a third connection portion 1133 formed by extending the second connection portion 1132 in a direction away from the voice coil 112, and a fourth connection portion 1134 formed by bending and extending the third connection portion 1133, where the first fixing portion 1141 is fixedly connected to the fourth connection portion 1134, and the two second connection portions 1132 are connected to two sides of the voice coil 112 along the first direction and respectively facing away from the voice coil 112. It is understood that the two second connection portions 1132 are connected to two sides of the voice coil 112 along the first direction and respectively opposite to the two sides of the voice coil 112. As can be appreciated, the two second connection portions 2411132 are connected to the two sides of the voice coil 112 in the first direction and are respectively opposite to the two sides of the voice coil 112, so that the voice coil 112 can be uniformly supported and the vibration stability of the voice coil 112 in the magnetic gap can be improved.

In an embodiment, in order to improve the connection stability of the sound generating unit 1 and the vibration unit 2, the metal insert 132 is further embedded on the annular bracket 131, and the metal insert 132 is welded and fixed with the metal housing 21. The metal insert 132 is annular, the metal insert 132 is provided with an avoidance groove 1321, and the magnetic component of the sound generating unit 1 is arranged in the avoidance groove 1321.

In the present embodiment, as shown in fig. 15 to 17 and 20, the case 21 may have a structure having a housing space in which the stator, the vibrator 23, and the elastic member 24 are housed, such as a frame body or a case body. The housing 21 may be an integrally formed structure or may include a plurality of portions formed in combination. For example, the housing 21 includes a bottom plate 211, a support plate 213 opposed to the bottom plate 211, and a side plate 212 connecting the bottom plate 211 and the support plate 213, the bottom plate 211, the support plate 213, and the side plate 212 define an accommodating space, and the sound generating unit 1 is provided in the support plate 213. The bottom plate 211, the support plate 213 and the side plate 212 may be integrally formed or may be connected to each other.

As an embodiment, the side plate 212 includes two first side plates 2121 disposed opposite to each other and a second side plate 2122 connecting the two first side plates 2121, the first side plates 2121 are bent toward the inside of the housing 21 to form the support plate 213, and the auxiliary housing 13 is connected and fixed to the second side plate 2122 or the support plate 213, or the auxiliary housing 13 is connected and fixed to the second side plate 2122 and the support plate 213 at the same time. More specifically, the auxiliary housing 13 includes a ring bracket 131 and a metal insert 132 embedded in the ring bracket 131, and the metal insert 132 is fixedly connected to the second side plate 2122 or the support plate 213. Alternatively, the metal insert 132 is connected and fixed to both the second side plate 2122 and the support plate 213.

In this embodiment, as shown in fig. 20, the housing 21 is made of metal, and the metal housing 21 can more stably support the sound generating unit 1, and at the same time, compared with the housing 21 made of plastic, the metal housing 21 can reduce the size of the vibration unit 2, thereby further reducing the occupation of the space of the electronic device. The metal insert 132 is located at the inner side of the second side plate 2122, and the outer surface of the metal insert 132 is welded to the inner surface of the second side plate 2122, so that connection reliability of the sound generating unit 1 and the vibration unit 2 is improved, thickness of the vibration sound generating device 100 is reduced, and occupation of terminal electronic equipment is reduced.

In an embodiment, the auxiliary housing 13 includes two plastic portions 133, the two plastic portions 133 are disposed at two ends of the auxiliary housing 13 along the second direction, each magnetic assembly includes a second magnetic conductive plate 121 and a magnet disposed at one side of the second magnetic conductive plate 121 far away from the diaphragm 111, the two second magnetic conductive plates 121 and the plastic portions 133 are integrally injection molded, a limiting slot 1331 is formed between the two plastic portions 133, and the magnet is disposed in the limiting slot 1331. It should be noted that, both ends of the two second magnetic conductive plates 121 are injection molded with the plastic portion 133, and the two second magnetic conductive plates 121 may be an integral structure or a split structure. The plastic part 133 is utilized to mold the second magnetic conduction plate 121 and form a magnet limiting structure, so that the separation and falling off of the magnetic assembly are effectively prevented when the product falls, and the connection firmness of the magnetic assembly is improved.

In one embodiment, the plastic portion 133 is positioned within the relief slot 1321 and cooperates with the metal insert 132 to limit the magnetic assembly.

Optionally, a conductive terminal 1332 is injection molded on the plastic portion 133, an inner pad of the conductive terminal 1332 is electrically connected with the second pad 11431 of the conductive support piece 114, and an outer pad of the conductive terminal 1332 is exposed on an outer side wall of the plastic portion 133 and is electrically connected with the flexible circuit board, so as to be electrically connected with an external circuit.

In an embodiment, as shown in fig. 7 to 9 and 11, the diaphragm 111 includes a diaphragm body 1111 and a reinforcing portion 1112, the reinforcing portion 1112 is disposed in a central region of the diaphragm body 1111, the reinforcing portion 1112 is provided with a first reinforcing rib 11121 corresponding to the frame 113, the first reinforcing rib 11121 is annular and encloses a connection region, and the frame 113 is fixedly connected with the connection region. Specifically, the first reinforcing rib 11121 is formed recessed from a side of the diaphragm 111 facing away from the voice coil 112 toward a side facing the voice coil 112. The first reinforcing ribs 11121 enclose to form a connection area fixed with the frame 113, and more glue can be stored in the connection area to enhance the connection stability between the diaphragm 111 and the frame 113.

Further, the reinforcing portion 1112 is further provided with a second reinforcing rib 11122 provided in the second direction, and both ends of the second reinforcing rib 11122 are connected to the first reinforcing rib 11121. The reinforcing portion 1112 is provided with the first reinforcing rib 11121 and the second reinforcing rib 11122, so that the strength of the diaphragm 111 can be improved, and the acoustic performance of the sound generating unit 1 can be improved. It will be appreciated that the first reinforcing rib 11121 and the second reinforcing rib 11122 may be integrally formed by stamping, or may be formed separately.

In an embodiment, the sound generating unit 1 further includes a front cover 135 disposed on a side of the diaphragm 111 away from the magnetic circuit 12, the front cover 135 is connected to a periphery of the diaphragm 111, the front cover 135 is made of metal, and the front cover 135 is provided with a through hole facing the central region of the diaphragm 111. During the carrying and mounting process of the sound generating unit 1, the front cover 135 can effectively avoid the risk of the diaphragm 111 being damaged by external force.

In one embodiment, as shown in fig. 27, the diaphragm 111 protrudes in a direction away from the voice coil 112, and the diaphragm 111 includes a central portion 1113 in the middle and edge portions 1114 located at both ends of the central portion 1113 in the second direction and bent toward a direction approaching the voice coil 112. Therefore, the internal space of the electronic equipment, such as the internal space of the circular intelligent watch, can be more fully utilized, and a larger space, such as a battery and the like, is reserved for other parts in the electronic equipment, so that the endurance time of the electronic equipment can be prolonged. It should be noted that, the scheme in this embodiment may also be applied to other intelligent terminals, such as VR, AR, a handle, a mobile phone, and other devices.

Further, the central portion 1113 is a flat or curved portion, and the edge portion 1114 is a flat or curved portion. As one of the embodiments, as shown in fig. 11, the central portion 1113 is a planar portion, and the edge portion 1114 is a curved portion, so that the arrangement can not only efficiently utilize the space of the whole machine, but also has the advantage of more convenient production and inspection, and meanwhile, improves the yield of the product.

As shown in fig. 1 to 2, 15 to 17, 20, and 23 to 26, the vibration/sound generating device 100 of the present invention further includes an FPCB3, the FPCB3 including a first conductive terminal 311, a second conductive terminal 321, and a third conductive terminal 322, the first conductive terminal 311 providing an electrical signal to the vibration unit 2, the second conductive terminal 321 providing an electrical signal to the sound generating unit 1, and the third conductive terminal 322 being electrically connected to the first conductive terminal 311 and the second conductive terminal 321, respectively, and to an external circuit. The FPCB3 simultaneously provides the electric signals to the vibration unit 2 and the sound generating unit 1, reduces the arrangement of parts of the vibration sound generating apparatus 100, and is beneficial to the integrated design of the vibration sound generating apparatus 100.

Specifically, the FPCB3 includes a first portion 31 disposed in the housing 21 and fixed between the coil 22 and the housing 21, and a second portion 32 extending outside the housing 21, the first portion 31 is provided with a first conductive end 311, the second portion 32 is provided with a second conductive end 321 and a third conductive end 322, the first conductive end 311 is connected to the coil 22, the second conductive end 321 extends to the plastic portion 133 and is connected to the conductive terminal 1332, and the third conductive end 322 is connected to an external circuit.

More specifically, to better support the FPCB3, the second portion 32 is attached to the surface of the housing 21, the outer edge of the second portion 32 does not exceed the outer edge of the vibration sound device 100, and the third conductive end 322 is disposed between the first conductive end 311 and the second conductive end 321. Of course, the third conductive end 322 may also extend out of the housing 21, which is not limited herein.

The invention also provides an electronic device 200, and the electronic device 200 comprises a device housing 201 and the vibration sounding apparatus 100, wherein the vibration sounding apparatus 100 is arranged in the device housing 201. The specific structure of the vibration sound generating device 100 refers to the structure of the vibration sound generating device 100 of the foregoing embodiment, and since the electronic apparatus 200 adopts all the technical solutions of all the foregoing embodiments, at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, and will not be described in detail herein.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims (13)

1. A vibration sound producing apparatus, comprising:

the sound generating unit comprises a vibration system and a magnetic circuit system, wherein the magnetic circuit system comprises two magnetic assemblies which are distributed along a first direction and are arranged at intervals to form a magnetic gap, the vibration system comprises a vibrating diaphragm and a voice coil which drives the vibrating diaphragm to vibrate, the voice coil is flat and is arranged in the magnetic gap, the axial direction of the voice coil is parallel to the first direction, and the vibration direction of the vibrating diaphragm is perpendicular to the axial direction of the voice coil;

The vibrating unit comprises a shell, a stator arranged in the shell, a vibrator and an elastic piece for connecting the vibrator and the shell, and the vibrating unit and the sounding unit are stacked along the vibrating direction of the vibrating diaphragm; wherein,,

the stator is fixed in the coil of shell, the oscillator includes the mass block and locates the permanent magnet of mass block, the permanent magnet is the halbach array of arranging along the second direction, halbach array has magnetic field enhancement side and magnetic field weakening side, magnetic field enhancement side is towards the coil, magnetic field weakening side is towards sound generating unit, the oscillator vibrates along the second direction, the second direction perpendicular to the vibration direction of vibrating diaphragm with first direction.

2. The vibratory sound device of claim 1 having a width in a first direction and a length in a second direction, the length being greater than or equal to 1.5 x the width.

3. The vibration and sound device according to claim 1, wherein the vibration unit includes a stopper for restricting a vibration stroke of the vibrator in the second direction.

4. A vibration and sound device according to claim 3, wherein said mass includes a middle portion and end portions at both ends of said middle portion, said end portions protruding toward a side close to said coil with respect to said middle portion, said coil being located between both said end portions, and said stopper being located between said coil and said end portions.

5. The vibration and sound production device according to claim 4, wherein a first groove is formed in the surface of the middle part facing the coil, and the permanent magnet is embedded in the first groove;

and/or the shell, the mass block and the elastic piece are all made of metal materials, and the elastic piece is fixedly welded with the mass block or the elastic piece is fixedly welded with the shell.

6. The vibration and sound device according to claim 4, wherein the number of the limiting members is two, and the two limiting members are respectively located at two sides of the coil along the second direction;

and/or the limiting piece comprises a plane plate and a vertical plate which is arranged at an included angle with the plane plate, and the vertical plate is arranged at one side of the plane plate far away from the coil;

and/or, one side of the limiting piece, which is far away from the coil, is also provided with a buffer block, and the buffer block is made of foam or silica gel.

7. The vibration-sound-producing device according to claim 1, wherein the halbach array includes a middle magnet and outer magnets provided on both sides of the middle magnet, the middle magnet being magnetized in a vibration direction of the diaphragm, the two outer magnets being magnetized in the second direction and magnetized in opposite directions;

the number of the coils is two, the two coils are arranged along the second direction, and the two coils and the permanent magnet are oppositely arranged.

8. The vibration and sound device according to claim 1, wherein the vibrator further comprises a first magnetic conductive plate provided at a side of the permanent magnet remote from the coil.

9. The vibration-sound-producing device according to claim 7, wherein in the second direction, the two coils include adjacent first coil sections and second coil sections respectively opposed to the first coil sections, current directions of the two coils are opposite, the adjacent two first coil sections commonly correspond to the intermediate magnet, and the two second coil sections respectively correspond to the outer magnet.

10. The vibration-sound-producing device according to claim 9, wherein portions of the two second coil sections are opposed to the outer magnet and are located partially outside the outer magnet in a vibration direction of the diaphragm; along the second direction, the distance from the edge of the middle magnet close to the outer magnet to the inner edge of the second coil section is A, the distance from the outer edge of the outer magnet far away from the middle magnet to the outer edge of the second coil section is B, and the maximum amplitude of the vibrator along the second direction is Xmax, A > Xmax, and B > Xmax;

And/or, the middle magnet, the outer magnet and the coil are all long-strip-shaped, and the first coil section and the second coil section are long-axis sections of the coil.

11. The vibration and sound device according to claim 1, wherein the number of the elastic members is two, the elastic members are respectively disposed at two ends of the vibrator along the second direction, the elastic members include two connecting portions at two ends and a deformed portion in the middle, one connecting portion is fixed to the vibrator, the other connecting portion is fixed to the housing, and the deformed portion extends from one connecting portion around the vibrator to the other connecting portion.

12. The vibration and sound device according to claim 1, wherein each magnetic assembly comprises a second magnetic conduction plate, and a first magnet and a second magnet which are sequentially arranged on one side of the second magnetic conduction plate far away from the vibrating diaphragm, wherein the first magnet is magnetized along the vibrating direction of the vibrating diaphragm, the magnetizing direction of the second magnet is perpendicular to the vibrating direction of the vibrating diaphragm, and the magnetic pole of one end of the second magnet close to the magnetic gap is opposite to the magnetic pole of one end of the first magnet close to the second magnetic conduction plate;

The magnetizing directions of the two opposite first magnets of the two magnetic assemblies are opposite, and the magnetizing directions of the two opposite second magnets are the same.

13. An electronic device comprising a device housing and a vibration sound emitting device according to any one of claims 1 to 12, the vibration sound emitting device being provided in the device housing.