CN110177318B

CN110177318B - Vibration sound production device and electronic product

Info

Publication number: CN110177318B
Application number: CN201910377265.6A
Authority: CN
Inventors: 毛东升; 朱跃光; 史德璋; 马咪
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2021-07-23
Anticipated expiration: 2039-05-07
Also published as: WO2020224281A1; CN110177318A

Abstract

The invention discloses a vibration sound production device and an electronic product. The vibration and sound production device comprises a vibration assembly and a sound production device, wherein the vibration assembly comprises a shell and a fixing piece, the fixing piece is arranged in the shell, the shell comprises a screen and a rear cover, the screen and/or the rear cover are used as vibration parts, and the vibration parts are configured to vibrate relative to the fixing piece; the driving assembly comprises at least one coil and at least one Halbach magnet, the coil is provided with a hollow area, a wiring area of the coil is arranged around the hollow area, one of the coil and the Halbach magnet is fixedly connected with the shell, and the other of the coil and the Halbach magnet is fixedly connected with the fixing piece; the halbach magnet forms a multilayer structure, and is configured to form a magnetic field enhancement region at a side near the coil, through which the coil passes.

Description

Vibration sound production device and electronic product

Technical Field

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

Background

Screen-sound technology is increasingly being used in electronic terminals. Electromagnetic drivers of screen sound generators are generally classified into resonant drivers and direct-drive drivers. The direct-drive exciter can directly drive the screen to vibrate. Compared with a resonant type exciter, the vibration mode can reduce energy loss in the vibration process.

Fig. 1 shows a direct-drive type exciter in the prior art, which adopts a structural distribution manner that an electromagnet 02 and a magnet 03 are oppositely arranged, and by turning on and off the electromagnet 02 or switching the magnetic poles of the electromagnet 02, a variable adsorption and repulsion action is generated between the electromagnet 02 and the magnet 03. Then the magnet 03 is fixed on the mobile phone screen 01, and the electromagnet 02 is fixed on a stationary part in the mobile phone, so that the mobile phone screen 01 can vibrate.

In this solution, assuming that the vertical displacement is x, an attractive force is present between the two magnets, and a force f (x) is present between the first magnet and the second magnet, which force is related to the displacement. The restoring force of the self-rigidity of the screen is F (kmsx), and a state of force balance exists at the moment

. After the coil of the electromagnet 02 is energized, the magnetic field between the two magnets is disturbed, and thus the forces between the electromagnet 02 and the magnet 03 are out of balance, for example: because of the cocurrent magnetic field of the current enhanced attraction, the two magnets have a tendency to approach each other, and the screen has an opposite restoring force and a damping force during the motion, so the motion equation is:

wherein B is the equivalent magnetic induction intensity, H is the equivalent magnetic field intensity, and S is the equivalent area of the interaction between the two permanent magnets.

The magnet is usually a whole magnet, and the magnet has low magnetic field density, low magnetic field utilization rate and small driving force of electronic products.

Therefore, a new technical solution is needed to solve the above technical problems.

Disclosure of Invention

One object of the present invention is to provide a new solution for a vibration sound-generating device.

According to a first aspect of the present invention, a vibratory sound generating apparatus is provided. This vibration sound generating device includes: a vibration assembly including a housing and a fixing member, the fixing member being disposed within the housing, the housing including a screen and a rear cover, the screen and/or the rear cover serving as a vibration portion configured to be vibratable relative to the fixing member; the driving assembly comprises at least one coil and at least one Halbach magnet, the coil is provided with a hollow area, a wiring area of the coil is arranged around the hollow area, one of the coil and the Halbach magnet is fixedly connected with the shell, and the other of the coil and the Halbach magnet is fixedly connected with the fixing piece; the Halbach magnet forms a multi-layered structure, the Halbach magnet being configured to form a magnetic field enhancement region at a side near the coil, the coil passing through the magnetic field enhancement region; the coil is in a parallel posture relative to the vibration part, the annular end face of the coil faces the Halbach magnet, the coil is configured to be capable of being electrified with an alternating current signal, the electrified wiring area penetrates through the magnetic field enhancement area, and an ampere force in a direction perpendicular to the main direction of the vibration part is generated between the coil and the Halbach magnet; alternating current signals led into the coil enable the direction of the ampere force to change in an alternating and reverse mode, and the vibration assembly is subjected to the alternating ampere force transmitted by the driving assembly so that the vibration portion vibrates and produces sound relative to the fixing piece.

Optionally, the halbach magnet comprises a main magnetic circuit portion and a side magnetic circuit portion, the main magnetic circuit portion and the side magnetic circuit portion are located at different layers, the side magnetic circuit portion is arranged on the main magnetic circuit portion, the main magnetic circuit portion is located between the side magnetic circuit portion and the coil, a gap is formed in the middle of the side magnetic circuit portion, the opposite side magnetic circuit portions are parallel to the plane of the coil in the magnetizing direction and opposite in the magnetizing direction, and the magnetizing direction of the main magnetic circuit portion is perpendicular to the plane of the coil in the magnetizing direction.

Optionally, the magnetizing direction of the opposite side magnetic circuit portion is directed to the gap, and the magnetizing direction of the main magnetic circuit portion is directed to the coil.

Optionally, the magnetizing direction of the opposite side magnetic circuit portion faces away from the gap, and the magnetizing direction of the main magnetic circuit portion faces away from the coil.

Alternatively, the side magnetic path portions are provided in an even number and are arranged opposite to each other two by two around the gap.

Optionally, the number of the side magnetic circuit portions is two or four.

Optionally, the side magnetic circuit portion is of an annular structure.

Alternatively, the main magnetic path portion and the side magnetic path portion are independent of each other, the side magnetic path portion is plural, and the side magnetic path portions are independent of each other.

Optionally, an auxiliary magnet is disposed within the hollow region, the auxiliary magnet repelling the main magnetic circuit portion.

Optionally, a magnetically permeable material is disposed within the gap.

Optionally, the magnetic field enhancement device further comprises a first housing, wherein the first housing is a dish structure with one open end, the halbach magnet is positioned in the first housing, and the magnetic field enhancement region is positioned on the open side of the first housing.

Optionally, the coil comprises a first shell and a second shell, wherein the first shell is a dish-shaped structure with one open end, the coil is positioned in the second shell, and the open end of the first shell is opposite to the open end of the second shell.

Optionally, the first housing and the second housing are made of a magnetically conductive material.

Optionally, a hollow structure is formed at a position of the second housing corresponding to the hollow area.

According to another aspect of the present disclosure, an electronic product is provided. The electronic product includes:

the vibration sounding device; and the fixing piece is a part of the structure of the product main body, and the driving assembly is arranged in the product main body.

Optionally, the fixing member is a middle frame, a PCB or a side wall of the product body.

According to one embodiment of the present disclosure, a magnetic field enhancement region is formed at a side of the halbach magnet close to the coil, and a magnetic field at a region other than the magnetic field enhancement region is relatively weak, thereby effectively increasing a driving force of the vibration sound generation device.

Further, the halbach magnet is a multilayer structure. Thus, the Halbach magnet forms a closed magnetic circuit in a three-dimensional space, and the magnetic induction intensity is higher.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a direct-drive actuator in the prior art.

Fig. 2 is an exploded view of a drive assembly according to one embodiment of the present disclosure.

FIG. 3 is a schematic structural diagram of a drive assembly according to one embodiment of the present disclosure.

Fig. 4 is a cross-sectional view of a halbach magnet according to one embodiment of the present disclosure.

Fig. 5 is a cross-sectional view of another halbach magnet according to one embodiment of the present disclosure.

Fig. 6 is a cross-sectional view of a drive assembly according to one embodiment of the present disclosure.

Fig. 7 is a partial schematic view of an electronic product according to another embodiment of the present disclosure.

Description of reference numerals:

11: a first housing; 12: a second housing; 13: a side magnet; 14: a main magnet; 15: a coil; 16: a hollow structure; 17: an auxiliary magnet; 18: a screen; 19: a middle frame; 20: a gap; 110: a first portion; 120: a second portion; 130: halbach magnets.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to one embodiment of the present disclosure, a vibratory sound generating apparatus is provided. The vibration sound production device comprises a vibration assembly and a driving assembly.

The vibration assembly includes a housing and a mount. The fixture is disposed within the housing. The housing includes a screen 18 and a rear cover. The screen 18 is disposed opposite the rear cover. The screen and/or the rear cover serve as a vibration part. The vibration part is a part of the shell for vibration and sound production. The vibrating portion is configured to be vibratable relative to the fixed member; the screen 18 will be described as an example. The fixing part can be a certain fixing part in an electronic product applied to the sound generating device, and can also be a separately configured fixed part.

As shown in fig. 2, the drive assembly includes at least one coil 15 and a halbach magnet 130. For example, the coil 15 is wound from a wire in one direction in a closed loop configuration. The coil 15 has a hollow area, and the periphery of the hollow area is a routing area of the coil. The trace area of the coil 15 includes two straight sides along the long axis (shown as a in fig. 2) and two connecting sides for connecting the two straight sides.

One of the coil 15 and the halbach magnet 130 is fixedly connected to the vibrating portion, and the other is fixedly connected to the fixing member. For example, the coil 15 is attached to the mount and the halbach magnet 130 is attached to the screen 18. The coil 15 generates heat during operation, and the screen 18 is not damaged because the coil 15 is not fixedly connected with the screen 18. The halbach magnet 130 includes multiple portions of different magnetization directions. The magnetizing direction is the direction indicated by the arrow in fig. 4, wherein the polarity of the end indicated by the arrow is N-pole. The magnetic field of the predetermined area can be strengthened by setting the magnetizing directions of the parts, namely, the magnetic field strengthening area is formed.

In this example, the halbach magnet 130 forms a multilayer structure. The multilayer structure means that a plurality of layers are formed in a direction perpendicular to the plane of the coil. The halbach magnet 130 is configured to form a magnetic field enhancement region at a side close to the coil 15, while the magnetic field strength is significantly reduced at other regions of the halbach magnet 130. The coil 15 passes through the field enhancement region and the halbach magnet 130 vibrates relative to the coil 15 in a direction perpendicular to the plane of the coil 15. The plane of the coil 15 is parallel to the annular end face of the coil. For example, at least one straight side of the coil 15 passes through the magnetic field enhancement region. The coil 15 is in a parallel posture with respect to the vibrating portion (e.g., the screen 18). The annular end face of the coil 15 faces the halbach magnet 130. The coil 15 is configured to be able to be supplied with an alternating current signal. The powered trace region passes through the magnetic field enhancement region. An ampere force in a direction perpendicular to the main body direction of the vibrating portion is generated between the coil 15 and the halbach magnet 130. For example, the main body direction of the vibrating portion is the extending direction of the main surface of the screen or the rear cover.

The alternating current signal led into the coil 15 makes the direction of the ampere force change in an alternating and reverse way, and the vibration component receives the alternating ampere force transmitted by the driving component so that the vibration part vibrates and produces sound relative to the fixing component.

In this example, a magnetic field enhanced region is formed on the halbach magnet 130 on the side close to the coil 15, and the magnetic field is relatively weak in the region other than the magnetic field enhanced region, thereby effectively increasing the driving force of the vibration sound generation device.

Further, the halbach magnet 130 is a multilayer structure. Thus, the halbach magnet 130 forms a closed magnetic circuit in a three-dimensional space, and the magnetic induction strength is higher.

In one example, the Halbach magnet 130 includes a main magnetic circuit portion and a side magnetic circuit portion, the main magnetic circuit portion and the side magnetic circuit portion being located at different layers. The side magnetic path portion is provided on the main magnetic path portion. The side magnetic path portion is fixed to the main magnetic path portion by, for example, an adhesive. The main magnetic path portion is located between the side magnetic path portion and the coil. A gap 20 is formed in the middle of the side magnetic path portion. The magnetizing directions of the opposite side magnetic circuit parts are parallel to the plane of the coil and opposite to each other. The magnetizing direction of the main magnetic circuit part is perpendicular to the plane of the coil. The magnetic lines of force of the side magnetic circuit portion are joined to the main magnetic circuit portion by the gap 20. Or the magnetic lines of force of the main magnetic circuit part are jointed with the side magnetic circuit part through the gap 20. The person skilled in the art can set the position of the magnetic field enhancement region according to the actual need.

For example, as shown in fig. 2 and 4, the main magnetic path portion and the side magnetic path portion are independent of each other. That is, the main magnet 14 and the side magnet 13 are independent from each other. For example, the main magnet 14 and the side magnet 13 are both bar magnets. The number of the side magnetic path portions is plural. The plurality of side magnetic path portions are independent of each other. That is, the plurality of edge magnets 13 are independent of each other. In this example, the halbach magnet 130 is a magnet array in which a plurality of bar magnets having a predetermined magnetization direction are arranged. This arrangement facilitates the manufacture of the halbach magnet 130.

The side magnetic circuit part may be a ring structure. For example, a circular ring shape, a rectangular ring shape, an elliptical ring shape, etc. The main magnetic path portion is located below the side magnetic path portion. In this example, the side magnetic path portion is a ring-shaped side magnet 13. The side magnets 13 are magnetized in a direction directed toward the gap 20 or away from the gap 20. This structure also enables the formation of a magnetic field enhancement region on the side close to the coil.

In one example, as shown in fig. 4, the magnetizing direction of the opposite side magnetic path portions is directed toward the main magnetic path portion. The main magnetic circuit portion is magnetized in a direction directed toward the coil 15. In this example, the magnetic field enhancement region is located below the layer in which the main magnetic path portion is located. The two straight sides of the coil 15 pass through the field enhancement region. The direction of the ampere force applied to the two straight sides is the same.

Specifically, the magnetic lines of force of the halbach magnet 130 are emitted from the main magnet 14 and are respectively directed outward to the two straight sides of the coil 15. And returns to the respective corresponding side magnet 13 after passing through the two straight sides, thereby forming a closed magnetic circuit. The magnetic force lines are in the horizontal direction or approximately in the horizontal direction when passing through the two straight edges.

In one example, as shown in fig. 7, the magnetizing direction of the opposing side magnetic path portions is away from the main magnetic path portion. The main magnetic circuit portion is magnetized in a direction away from the coil 15. In this example, the field enhanced region is also formed below the layer where the main magnet 14 is located. The two straight sides of the coil 15 pass through the field enhancement region. The direction of the ampere force applied to the two straight sides is the same.

Specifically, the magnetic lines of force of the halbach magnet 130 are emitted by the side magnets 13, respectively directed inwardly toward the two straight sides of the coil 15. After passing through the two straight edges, the magnetic pole returns to the main magnet 14 positioned at the lower layer, thereby forming a closed magnetic circuit. The magnetic force lines are in the horizontal direction or approximately in the horizontal direction when passing through the two straight edges.

Both of these structures can form a field enhancement region under the layer where the main magnet 14 is located.

In one example, there are an even number of side magnetic path portions, and two are oppositely disposed around the gap 20. The number of side magnetic circuit portions can be set by those skilled in the art according to actual needs.

For example, the number of the side magnetic path portions is two. As shown in fig. 2, both side magnets 13 are bar magnets. The main magnet 14 is a rectangular sheet magnet. Two edge magnets 13 are located on either side of the gap 20 along the long axis. The straight sides of the coil 15 are opposed to the two side magnets 13, respectively.

The number of the side magnetic path portions may be four. The four side magnets 13 are all bar magnets. The main magnet 14 is a rectangular sheet magnet. The four side magnets 13 are positioned above the main magnet 14. Wherein, the two longer side magnets 1 are parallel to the long sides of the main magnet 14. The two shorter side magnets are parallel to the short sides of the main magnet 14. The straight sides of the coil 15 correspond to the two longer side magnets, respectively, and the two connecting sides of the coil 15 correspond to the two shorter side magnets, respectively. In this example, the magnetic induction intensity of the magnetic field enhancement region formed by the halbach magnet 130 is larger. The driving force of the vibration sound generating device is larger.

In one example, as shown in fig. 7, an auxiliary magnet 17 is provided in a hollow region of the coil 15. The auxiliary magnet 17 is mutually repulsive to the main magnetic path portion. The auxiliary magnet 17 is positioned corresponding to the gap 20. for example, the auxiliary magnet 17 is a bar magnet. In this example, since the auxiliary magnet 17 repels the main magnet 14, the magnetic lines of force reaching the bottom wall of the second housing 12 can be reduced, and thus more magnetic lines of force can be urged to pass through the coil 15 (e.g., the straight side of the coil 15). Thus, the magnetic lines of force are more concentrated and the coil 15 is more strongly magnetically induced.

In one example, as shown in fig. 2-6, the vibratory sound generating apparatus further includes a first housing 11. The first housing 11 has a dish-like structure with one end open. The dish-like structure surrounds and forms a cavity. The halbach magnet 130 is located within the first housing 11. The main magnet 14 is near the open end. The magnetic field enhancement region is located at the open side of the first housing 11. The open side is the open end side of the dish. The halbach magnet 130 is fixed within the first housing 11 by, for example, an adhesive. The first housing 11 forms the halbach magnet 130 as a unitary structure. When assembling, the operator directly fixes the bottom wall of the first housing 11 to the outer shell or the fixing member. This makes the assembly of the halbach magnet 130 easy.

In one example, as shown in fig. 2-3, 6-7, the halbach magnet 130 further includes a second housing 12. Similar to the first housing 11. The second housing 12 has a dish-like structure with one end open. The dish-like structure surrounds and forms a cavity. The coil 15 is located within the second housing 12. For example, the end face of the coil 15 is bonded in the second housing 12 by an adhesive. One end face of the coil 15 is opposed to the halbach magnet 130. The open end of the first housing 11 is opposite to the open end of the second housing 12. When assembling, the operator directly fixes the bottom wall of the second housing 12 to the outer shell or the fixing member. This makes assembly of the coil 15 easy.

For example, an FPCB is also provided in the second housing 12. The FPCB is connected to the coil 15. The external line supplies power to the coil 15 through the FPCB.

In this example, as shown in fig. 3, by providing the first housing 11 and the second housing 12, the driving assembly of the vibration sound generating apparatus is formed into two separate parts, i.e., a first part 110 and a second part 120. The first portion 110 includes a first housing 11 and a halbach magnet 130. The second portion 120 includes the second housing 12 and the coil 15. The open ends of the two portions are opposite. Thus, the driving device has simple structure and easy installation.

In one example, the first housing 11 and the second housing 12 are magnetically permeable materials. For example, the magnetically permeable material includes SPCC, low carbon steel, and the like. The magnetic conduction material can effectively reduce the magnetic flux leakage phenomenon, so that more magnetic lines can pass through the coil 15, and the driving force of the vibration sound-generating device is obviously improved.

For example, the first housing 11 and the second housing 12 are both rectangular, and the two open ends are the same or equivalent in size. The magnetic flux can reach the side wall of the first housing 11 via the side wall of the second housing 12. Without passing through the first housing 11 and the second housing 12. The arrangement mode can effectively reduce the magnetic leakage phenomenon.

In one example, as shown in fig. 6, a hollow structure 16 is formed in a portion of the second case 12 corresponding to a hollow region of the coil 15. The hollowed-out structure 16 prevents the magnetic flux from passing from this location and directly reaching the side walls via the bottom wall of the second housing 12, thereby enabling more magnetic flux to pass through the coil 15. The hollow structure 16 effectively improves the utilization rate of the magnetic field and improves the driving force of the vibration sounding device.

According to another embodiment of the present disclosure, an electronic product is provided. The electronic product may be, but is not limited to, a mobile phone, a notebook computer, an electronic watch, a tablet computer, an interphone, etc.

As shown in fig. 7, the electronic product includes the vibration sound-generating device provided by the present invention and a product main body. The screen 18 is provided on the product body and serves as a display screen of an electronic product. The screen 18 may be provided in such a manner that one end is rotatably attached to the product body and the other end is freely movable; alternatively, the screen 18 may be made of a material having a good elastic deformability, and the screen 18 may be fixedly connected to other fixed members at one end and be freely movably disposed at the other end. In this way, the screen 18 is able to vibrate with respect to the body of the product. A portion of the product body may be configured as the fastener, and the driving assembly may be disposed within the product body. For example, the first housing 11 and the halbach magnet 130 are fixedly provided on the screen 18, and the coil 15 and the second housing 12 are fixedly provided on a part of the product main body corresponding to the fixing member. The screen 18 can be driven to vibrate and sound by the ampere force generated by the driving component. Because the electronic product provided by the invention adopts the vibration sound production device provided by the invention, the occupied space of the electronic product in the thickness direction parallel to the screen 18 is less, the electronic product is more favorably designed to be thinner, and the design requirement of lightening and thinning the electronic product is met.

In one example, the fixture may be a bezel 19, PCB, sidewall, etc. structure within the product body. In the product main body, in order to mount other electronic devices, the product main body is often provided with a partition, a middle frame 19, and the like. A rear cover is provided on the side of the middle frame 19 opposite the screen 18. These structural components have good structural stability in electronic products, on the one hand for use in electronic devices, and on the other hand for protecting electronic devices. Therefore, the structure member in the product body is used as the fixing member, so that the conversion rate of converting ampere force into vibration can be improved, and the vibration reliability can be improved. The inner surface of the side wall of the product body may also serve as the fixing member.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A vibration sound production device is characterized in that:

a vibration assembly including a housing and a fixing member, the fixing member being disposed within the housing, the housing including a screen and a rear cover, the screen and/or the rear cover serving as a vibration portion configured to be vibratable relative to the fixing member;

the driving assembly comprises at least one coil and a Halbach magnet, the coil is provided with a hollow area, a wiring area of the coil is arranged around the hollow area, one of the coil and the Halbach magnet is fixedly connected with the shell, and the other of the coil and the Halbach magnet is fixedly connected with the fixing piece; the Halbach magnet forms a multi-layered structure, the Halbach magnet being configured to form a magnetic field enhancement region at a side near the coil, the coil passing through the magnetic field enhancement region;

the coil is in a parallel posture relative to the vibration part, the annular end face of the coil faces the Halbach magnet, the coil is configured to be capable of being electrified with an alternating current signal, the electrified wiring area penetrates through the magnetic field enhancement area, and an ampere force in a direction perpendicular to the main direction of the vibration part is generated between the coil and the Halbach magnet;

alternating current signals led into the coil enable the direction of the ampere force to change in an alternating and reverse mode, and the vibration assembly is subjected to the alternating ampere force transmitted by the driving assembly so that the vibration part vibrates and produces sound relative to the fixing piece;

the halbach magnet includes a main magnetic circuit portion and a side magnetic circuit portion, the main magnetic circuit portion and the side magnetic circuit portion being located at different layers, the side magnetic circuit portion being provided on the main magnetic circuit portion, the main magnetic circuit portion being located between the side magnetic circuit portion and the coil.

2. A vibratory sound generating apparatus as claimed in claim 1, wherein: and a gap is formed in the middle of the side magnetic circuit part, the magnetizing directions of the opposite side magnetic circuit parts are parallel to the plane of the coil and opposite, and the magnetizing direction of the main magnetic circuit part is perpendicular to the plane of the coil.

3. A vibratory sound generating apparatus as claimed in claim 2, wherein: the magnetizing direction of the opposite side magnetic circuit part points to the gap, and the magnetizing direction of the main magnetic circuit part points to the coil.

4. A vibratory sound generating apparatus as claimed in claim 2, wherein: the magnetizing direction of the opposite side magnetic circuit part deviates from the gap, and the magnetizing direction of the main magnetic circuit part deviates from the coil.

5. A vibrating sound generating device according to any one of claims 2-4, characterised in that: the side magnetic path portions are provided in an even number and are arranged in pairs opposite to each other around the gap.

6. A vibrating sound generating device as claimed in claim 5, wherein: the number of the side magnetic circuit parts is two or four.

7. A vibrating sound generating device according to any one of claims 2-4, characterised in that: the side magnetic circuit part is of an annular structure.

8. A vibrating sound generating device according to any one of claims 2-4, characterised in that: the main magnetic circuit part and the side magnetic circuit parts are mutually independent, the side magnetic circuit parts are multiple, and the side magnetic circuit parts are mutually independent.

9. A vibratory sound generating apparatus as claimed in claim 2, wherein: an auxiliary magnet is arranged in the hollow area, and the auxiliary magnet and the main magnetic circuit part repel each other.

10. A vibratory sound generating apparatus as claimed in any one of claims 2-4 and 9 wherein: and a magnetic conductive material is arranged in the gap.

11. A vibrating sound generating device according to any one of claims 1-4, characterised in that: still include first casing, first casing is the open-ended dish-shaped structure of one end, halbach magnet is located in the first casing, the magnetic field reinforcing region is located the open side of first casing.

12. A vibratory sound generating apparatus as claimed in claim 11, wherein: still include the second casing, the second casing is the open dish-shaped structure of one end, the coil is located in the second casing, the open end of first casing with the open end of second casing is relative.

13. A vibratory sound generating apparatus as claimed in claim 12, wherein: the first shell and the second shell are made of magnetic conductive materials.

14. A vibratory sound generating apparatus as claimed in claim 13, wherein: and a hollow structure is formed at the part of the second shell corresponding to the hollow area.

15. An electronic product, comprising:

a vibrating sound generating device as claimed in any one of claims 1 to 14; and

the product main part, the mounting is a part of the structure of product main part, drive assembly sets up in the product main part.

16. The electronic product of claim 15, wherein the fixing member is a middle frame, a PCB or a side wall of the product body.