Sound generating devices and electronic equipment

Abstract

The present invention discloses a sound-generating device and an electronic device. The sound-generating device includes a frame, an elastic support, a limiting structure, and a vibration system, a magnetic circuit system, and a coil structure distributed in sequence in the up-down direction. The vibration system includes a diaphragm and a voice coil. The edge of the diaphragm is fixed to the frame. After the voice coil is energized, it can interact with the magnetic field of the magnetic circuit system to generate a driving force in the up-down direction, so that the diaphragm vibrates and generates sound. At least part of the magnetic circuit system is supported by the elastic support to form a vibrator. The elastic support has elastic deformation in a first horizontal direction. The coil structure includes a coil, which is fixed relative to the frame. After the coil is energized, it can interact with the magnetic field of the magnetic circuit system to generate a driving force in the first horizontal direction, so that the vibrator moves in the first horizontal direction. The limiting structure is used to limit the vertical movable travel of the vibrator. The technical solution of the present invention can achieve the purpose of reducing the difficulty of designing the elastic support.

Description

Technical Field

[0001] The present invention relates to the technical field of sound energy conversion, and in particular to a sound generating device and an electronic device. Background Art

[0002] The speaker is an important acoustic component of portable electronic devices, used to complete the conversion between electrical signals and sound signals, and is an energy conversion device; the linear vibration motor is a type of motor and is also an important component of portable electronic devices, used to realize the function of vibration reminder.

[0003] The existing two-in-one speaker and vibration motor solution is that the speaker and motor share the same drive coil, and the speaker diaphragm and the motor vibrator vibrate in the same direction. This means that as long as the coil is energized, the speaker system and the motor system can only work at the same time due to the mutual action and reaction between the coil and the magnetic circuit. This cannot meet the diverse application scenarios of mobile phones, such as ringing without vibration or vibrating without ringing.

[0004] To solve this problem, we can only adjust the electrical signal, that is, filter the low-frequency music signal below the motor resonance frequency. Although this can reduce the vibration of the motor, it cannot completely eliminate it. The most important thing is that since the music signal has basically no low-frequency effect, the sound quality is very poor.

[0005] In addition, if you want the motor to work alone, you also need to load a low-frequency signal to the coil, so that the diaphragm of the speaker will also vibrate with the coil. Although the frequency is lower, the human ear can still hear it, affecting the effect of the whole machine.

[0006] When conducting a drop reliability test on the motor shrapnel of the two-in-one speaker and vibration motor solution, on the one hand, the motor shrapnel is required to have great stiffness in the vibration direction of the diaphragm to ensure that the two-in-one speaker and vibration motor system will not be damaged by collision under drop conditions; on the other hand, the stiffness of the motor shrapnel in the motor vibration direction cannot be too large to ensure that the requirements of low vibration frequency are met. Summary of the invention

[0007] The present invention provides a sound-generating device and an electronic device, aiming to solve the problem of difficulty in designing a motor shrapnel in the traditional technology.

[0008] To achieve the above object, the present invention proposes a sound-generating device, comprising a frame, an elastic support, a limit structure, and a vibration system, a magnetic circuit system, and a coil structure sequentially distributed in the up and down directions, wherein:

[0009] The vibration system includes a diaphragm and a voice coil, the edge of the diaphragm is fixed to the frame, and the voice coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in the up and down directions after being energized, so as to make the diaphragm vibrate and produce sound;

[0010] At least part of the magnetic circuit system is supported by the elastic support member to form a vibrator, and the elastic support member has elastic deformation along a first horizontal direction;

[0011] The coil structure includes a coil, the coil is fixed relative to the frame, and when energized, the coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in a first horizontal direction, so that the vibrator moves along the first horizontal direction;

[0012] The limiting structure is used to limit the upward and downward movement of the vibrator.

[0013] Optionally, the limiting structure includes:

[0014] a first supporting structure protruding from the lower end of the vibrator and / or the upper end of the coil structure, so that when the vibrator moves downward, the vibrator abuts against the coil structure through the first supporting structure to limit the downward movement of the vibrator; and / or,

[0015] The second supporting structure is protrudingly arranged on the upper end of the vibrator and / or the lower end of the vibration system, so that when the vibrator moves upward, it abuts against the vibration system through the second supporting structure to limit the upward movement of the vibrator.

[0016] Optionally, the limiting structure includes an upper limiting arm extending downward from the lower end of the vibrator, and a lower limiting arm extending upward from the upper end of the coil structure to be laterally opposite to the upper limiting arm;

[0017] At positions where the upper limit arm and the lower limit arm are opposite to each other, one of them is provided with a limit convex portion, and the other is correspondingly provided with an upper stop portion located above the limit convex portion and / or a lower stop portion located below the limit convex portion.

[0018] Optionally, the vibrator includes a plurality of central magnets and a central magnetic conductive plate, wherein the plurality of central magnets are distributed in a horizontal direction, and the central magnetic conductive plate covers the upper surfaces of the plurality of central magnets and is fixedly connected to the plurality of central magnets;

[0019] The outer peripheral side portion of the central magnetic conductive plate is bent downward to extend the upper limit arm.

[0020] Optionally, at least two upper limit arms are provided, and the two upper limit arms are respectively provided on two opposite sides of the central magnetic conductive plate in the horizontal direction.

[0021] Optionally, the vibrator includes a plurality of central magnets, a plurality of mass blocks and a central magnetic conductive plate, wherein the plurality of central magnets and the plurality of mass blocks are alternately distributed in a horizontal direction to jointly constitute a main structure of the vibrator, and the central magnetic conductive plate covers an upper surface of the main structure and is fixedly connected to the main structure;

[0022] The upper limit arm is formed at the lower end of the mass block.

[0023] Optionally, a clearance groove is provided at the lower end of the mass block;

[0024] The upper limit arm is protrudingly provided at the lower end of the mass block adjacent to the give way slot. The upper limit arm extends downward and bends toward the give way slot to form the lower stop portion, and the lower stop portion covers a portion of the notch of the give way slot.

[0025] Optionally, the coil structure further includes a lower magnetic conductive plate provided at the lower end of the coil;

[0026] The outer peripheral side portion of the lower magnetic conductive plate is bent upward to form the lower limit arm.

[0027] Optionally, the elastic support member includes a bent connecting arm and two elastic arms connected to the connecting arm, the two elastic arms are spaced apart along the movement direction of the vibrator, one of the elastic arms is connected to the vibrator, and the other elastic arm is fixed relative to the frame.

[0028] In addition, to achieve the above-mentioned purpose, the present invention further provides an electronic device, the electronic device comprising a sound-generating device, the sound-generating device comprising a frame, an elastic support member, a limiting structure, and a vibration system, a magnetic circuit system and a coil structure sequentially distributed in the up and down directions, wherein:

[0029] The vibration system includes a diaphragm and a voice coil, the edge of the diaphragm is fixed to the frame, and the voice coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in the up and down directions after being energized, so as to make the diaphragm vibrate and produce sound;

[0030] At least part of the magnetic circuit system is supported by the elastic support member to form a vibrator, and the elastic support member has elastic deformation along a first horizontal direction;

[0031] The coil structure includes a coil, the coil is fixed relative to the frame, and when energized, the coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in a first horizontal direction, so that the vibrator moves along the first horizontal direction;

[0032] The limiting structure is used to limit the upward and downward movement of the vibrator.

[0033] In the technical solution provided by the present invention, a speaker system and a motor system are each provided with a set of combinations, and different electrical signals can be input respectively to realize their respective operation or synchronous operation without affecting each other, thereby realizing the sound-generating function of the speaker and the function of the linear vibration motor at the same time, and obtaining better sound quality effects; the limiting structure limits the upward and downward movable travel of the vibrator, so that the stiffness requirement of the elastic support part in the vibration direction of the diaphragm is reduced, thereby facilitating the improvement of the stiffness of the elastic support part in the vibration direction of the vibrator, thereby achieving the purpose of reducing the difficulty of designing the elastic support part. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 A three-dimensional schematic diagram of a first embodiment of a sound-generating device provided by the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the explosion of the sound-generating device;

[0037] Figure 3 for Figure 1 A schematic plan view of the sound-generating device;

[0038] Figure 4 for Figure 3 A schematic cross-sectional view of the sound-generating device along AA;

[0039] Figure 5 for Figure 3 Schematic diagram of the cross section of the sound generating device along BB;

[0040] Figure 6 for Figure 1 A three-dimensional schematic diagram of the middle limit structure;

[0041] Figure 7 for Figure 6 A schematic diagram of the front view of the middle limit structure;

[0042] Figure 8 A three-dimensional schematic diagram of a second embodiment of the limiting structure provided by the present invention;

[0043] Fig. 9 for Figure 8 A schematic diagram of the front view of the middle limit structure;

[0044] Fig.10A three-dimensional schematic diagram of a third embodiment of the limiting structure provided by the present invention;

[0045] Fig.11 for Fig.10 Schematic diagram of the front view of the middle limit structure.

[0046] Description of Figure Numbers:

[0047]

[0048]

[0049] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] The present invention proposes a sound-generating device. It should be noted that the up and down directions in the embodiment of the present invention refer to the vibration direction of the vibration system, and the first horizontal direction refers to the direction perpendicular to the vibration direction; in addition, the second horizontal direction in the embodiment of the present invention is a direction perpendicular or approximately perpendicular to the first horizontal direction in the horizontal direction.

[0054] like Figures 1 to 11 As shown, the specific structure of the sound-generating device is described in detail below.

[0055] See also Figures 1 to 3 The sound-generating device provided by the present invention includes a frame 11, an elastic support member 35, a limiting structure, and a vibration system, a magnetic circuit system and a coil structure distributed in sequence along the up and down directions, wherein: the vibration system includes a diaphragm 21 and a voice coil 22, the edge of the diaphragm 21 is fixed to the frame 11, and the voice coil 22 can interact with the magnetic field of the magnetic circuit system to generate a driving force in the up and down directions after being energized, so that the diaphragm 21 vibrates and produces sound; at least part of the magnetic circuit system is supported by the elastic support member 35 to form a vibrator 30, and the elastic support member 35 has elastic deformation along the first horizontal direction; the coil structure includes a coil 41, and the coil 41 is fixed relative to the frame 11. After being energized, the coil 41 can interact with the magnetic field of the magnetic circuit system to generate a driving force in the first horizontal direction, so that the vibrator 30 moves along the first horizontal direction; the limiting structure is used to limit the up and down activity stroke of the vibrator 30.

[0056] In the technical solution provided by the present invention, a speaker system and a motor system are each provided with a set of combinations, and different electrical signals can be input respectively to realize their respective operation or synchronous operation without affecting each other, thereby realizing the sound-generating function of the speaker and the function of the linear vibration motor at the same time, and obtaining better sound quality effects; the limiting structure limits the upward and downward movable travel of the vibrator 30, so that the stiffness requirement of the elastic support member 35 in the vibration direction of the diaphragm 21 is reduced, thereby facilitating the improvement of the stiffness of the elastic support member 35 in the vibration direction of the vibrator 30, thereby achieving the purpose of reducing the design difficulty of the elastic support member 35.

[0057] In the present design, the frame 11 is used as a mounting member to fix the vibration system. The frame 11 is generally annular in shape and extends along the circumference of the vibration system. The frame 11 can be made of metal, which has a good heat dissipation effect and can achieve rapid heat dissipation inside the sound-generating device. In addition, the frame 11 can also be made of plastic material, which is convenient for integral injection molding of various parts.

[0058] The frame 11 can be Figure 2The structure shown is a ring structure with a very small height, and it can also be a ring structure with a larger height to form a storage space for accommodating the vibration system, the magnetic circuit system, the coil 41, etc.

[0059] The vibration system, as a component of the speaker system, can produce sound. The vibration system includes a diaphragm 21 and a voice coil 22, wherein the voice coil 22 is fixed to the bottom of the diaphragm 21 to drive the diaphragm 21 to vibrate. It should be noted that the voice coil 22 is fixed to the bottom of the diaphragm 21, which means that the voice coil 22 is directly connected to the diaphragm 21, or the voice coil 22 is connected to the diaphragm 21 through other structural parts, such as a bracket 23. The edge of the diaphragm 21 is fixed to the frame 11. Specifically, the edge of the diaphragm 21 is arranged along the circumference of the frame 11. The two can be fixed by bonding, or the diaphragm 21 is formed by a solid rubber material through a hot pressing process and combined with the surface of the frame 11, thereby realizing a sealed connection between the diaphragm 21 and the frame 11.

[0060] After being energized, the voice coil 22 can interact with the magnetic field of the magnetic circuit system to generate a driving force in the up and down directions, so that the diaphragm 21 vibrates and produces sound. Specifically, the magnetic circuit system can form a magnetic gap, and the voice coil 22 extends into the magnetic gap, and is affected by the magnetic field in the magnetic gap to achieve up and down movement. Taking the formation of a magnetic gap by the magnetic circuit system as an example, the magnetic circuit system may include an inner magnetic circuit system and an outer magnetic circuit system, and a magnetic gap is formed between the inner magnetic circuit system and the outer magnetic circuit system, and the voice coil 22 extends into the magnetic gap. Of course, in other embodiments, the magnetic circuit system can also be formed by combining an energized coil 41 with a magnet to drive the voice coil 22 to move up and down.

[0061] At least part of the magnetic circuit system is supported by an elastic support member 35 to form a vibrator 3030. The elastic support member 35 has elastic deformation along the first horizontal direction. The elastic support member 35 can support the vibrator 30 so that it is suspended above the coil 41. The vibrator 30 can be composed of an internal magnetic circuit system, or the vibrator 30 can be composed of an external magnetic circuit system. Furthermore, the vibrator 30 can also be composed of the entire magnetic circuit system. In this specific embodiment, the vibrator 30 is composed of an internal magnetic circuit system, and the external magnetic circuit system is fixed relative to the frame 11. The vibrator 30 can be used as a partial structure to form a magnetic gap, so that the speaker system and the motor system share part of the magnetic circuit. Of course, in other embodiments, the two may not share the part of the magnetic circuit of the vibrator 30.

[0062] The coil 41, as a component of the motor system, can drive the vibrator 30 to achieve vibration. The coil 41 is fixed relative to the frame 11. After the coil 41 is energized, it can interact with the vibrator 30 to generate a driving force in the first horizontal direction, so that the vibrator 30 moves along the first horizontal direction. In this embodiment, the coil 41 is fixed relative to the frame 11, which means that the coil 41 itself does not move. For example, the coil 41 itself can be directly fixed to the frame 11, or other connecting structures or supporting structures can be additionally provided to connect the coil 41 and the frame 11.

[0063] Please continue to combine Figure 4 and Figure 5 The working principle of the sound-generating device of the present invention is as follows:

[0064] The wire of the coil 41 is opposite to the lower magnetic pole of the vibrator 30 (in a specific embodiment, specifically the central magnet 32 ​​of the vibrator 30). When the coil 41 is energized, according to the left-hand rule, taking the first horizontal direction as the left-right direction as an example, the coil 41 is subjected to a force to the left, and because the force is mutual, similarly, the central magnet 32 ​​of the vibrator 30 is also subjected to a force in the opposite direction of the coil 41, such as a force to the right. Since the coil 41 is fixed relative to the frame 11, at this time, the central magnet 32 ​​moves to the right under the action of the coil 41, and drives the entire vibrator 30 to move to the right. When the current passing through the coil 41 is reversed, the vibrator 30 will move to the left, thereby achieving linear horizontal vibration.

[0065] In the above, the vibrator 30 can be used as a common part of the speaker system and the motor system, that is, the speaker system and the motor system share the center magnet 32, and the center magnet 32 ​​can be used as a part of the inner magnetic circuit system of the speaker system, and together with the outer magnetic circuit system of the speaker system, form a magnetic gap for accommodating the voice coil 22. After the voice coil 22 is energized, it is subjected to the horizontal magnetic field in the magnetic gap and generates a driving force in the up and down directions, driving the diaphragm 21 to make a sound. At the same time, the center magnet 32 ​​can also be used as a part of the motor system, and realizes movement in the first horizontal direction by cooperating with the coil 41 to generate vibration. Of course, the vibrator 30 can also be used as only a part of the motor system, and the speaker system realizes the up and down movement of the voice coil 22 by additionally setting up other types of magnetic circuit systems.

[0066] In one embodiment, the vibrator 30 includes a central magnet 32, and the magnetic poles of the central magnet 32 ​​are distributed in the up-down direction, that is, the central magnet 32 ​​is magnetized in the up-down direction, and its N pole and S pole are distributed in the up-down direction. For example, the upper end of the central magnet 32 ​​is the N pole, and the lower end of the central magnet 32 ​​is the S pole.

[0067] The vibrator 30 includes a plurality of center magnets 32, and the plurality of center magnets 32 are spaced apart along the moving direction of the vibrator 30 to form a first gap between two adjacent center magnets 32. The coil 41 includes a first wire segment 411 and a second wire segment 412 distributed along the moving direction of the vibrator 30, the first wire segment 411 is arranged corresponding to one of the center magnets 32, and the second wire segment 412 corresponds to the first gap. In this embodiment, the first wire segment 411 corresponds to the center magnet 32, which means that the first wire segment 411 is located directly below the center magnet 32, and the orthographic projection of the first wire segment 411 on the plane where the bottom surface of the center magnet 32 ​​is located at least partially falls on the bottom surface of the center magnet 32. Similarly, the second wire segment 412 is also located directly below the first magnetic gap.

[0068] Next, in one embodiment, the vibrator 30 further includes a mass block 33, and the central magnet 32 ​​and the mass block 33 are arranged alternately. The alternating arrangement here means that at least one mass block 33 is arranged between two adjacent central magnets 32, or at least one central magnet 32 ​​is arranged between two adjacent mass blocks 33. In a specific embodiment, a central magnet 32 ​​is arranged between two adjacent mass blocks 33, and a mass block 33 is arranged between two adjacent central magnets 32. Taking the three central magnets 32 forming two first gaps as an example, the vibrator 30 in this embodiment includes two mass blocks 33. In this embodiment, the mass block 33 is a non-magnetic body and does not act as a magnet, so no magnetic lines of force pass through it, and it will not act on the coil 41 below. The mass block 33 can also serve to increase the weight of the vibrator 30. This combination scheme can not only provide a strong magnetic field for both the speaker system and the motor system, but also ensure that the vibrator 30 of the motor system has sufficient mass, taking into account the performance of the speaker system and the motor system.

[0069] The mass blocks 33 and the center magnets 32 together form the main structure 31 of the vibrator 30. In the main structure 31, all the mass blocks 33 are located between the two outermost center magnets 32, that is, the structures on the two opposite sides in the arrangement direction of the multiple center magnets 32 are both center magnets 32. In this way, the number of center magnets 32 is always one more than the number of mass blocks 33. Correspondingly, more coils 41 can be set to increase the driving force of the vibrator 30.

[0070] The density of the mass block 33 can be greater than the density of the central magnet 32, so that the vibrator 30 can have sufficient mass. The central magnet 32 ​​can be made of high-performance magnets such as Nd-Fe-B, and the mass block 33 can be made of a material with poor magnetic conductivity but high density such as tungsten steel.

[0071] Next, in one embodiment, the vibrator 30 further includes a central magnetic conductive plate 34, which covers the upper surfaces of the plurality of central magnets 32 and is fixed to the plurality of central magnets 32. Specifically, the central magnetic conductive plate 34 has an upper magnetic conductive section 341 covering the upper surface of the central magnet 32. In this embodiment, the central magnetic conductive plate 34 covers the entire upper surface of the central magnet 32, thereby vertically attracting the magnetic lines of force to the upper magnetic conductive section 341. When the mass block 33 is provided, the central magnet 32 ​​and the mass block 33 together constitute the main structure 31 of the vibrator 30, and the upper magnetic conductive section 341 covers the upper surface of the entire main structure 31. The upper magnetic conductive section 341 can be a whole plate body, covering the entire upper surface of the central magnet 32 ​​and the mass block 33. Among them, the mass block 33 and the central magnet 32 ​​can be bonded and fixed to the upper magnetic conductive section 341.

[0072] In addition, the central magnetic plate 34 also has a side magnetic section 342, which is connected to the upper magnetic section 341 and extends downward, and the side magnetic section 342 and the upper magnetic section 341 together form a downwardly open accommodation space, in which the central magnet 32 ​​is disposed. When a mass block 33 is disposed between two adjacent central magnets 32, the mass block 33 is also disposed in the accommodation space.

[0073] The central magnetic conductive plate 34 may have two side magnetic conductive sections 342, the two side magnetic conductive sections 342 correspondingly connect the two opposite sides of the upper magnetic conductive section 341, and together with the upper magnetic conductive section 341 form a containing space, and the two side magnetic conductive sections 342 correspondingly abut the two opposite outer sides of the main structure 31. In this embodiment, the central magnetic conductive plate 34 is generally a U-shaped plate structure, with the U-shaped opening facing downward, and the central magnet 32 ​​and the mass block 33 are wrapped therein. The central magnet 32 ​​can be fixed to the central magnetic conductive plate 34 by bonding or welding, or can also be fixed by screwing or other methods.

[0074] When two side magnetic conductive segments 342 are set, the two side magnetic conductive segments 342 are distributed along the movement direction of the vibrator 30, so that the two side magnetic conductive segments 342 are along the distribution direction of multiple center magnets 32 and mass blocks 33, clamping the center magnets 32 and the mass blocks 33, so that the center magnets 32 and the mass blocks 33 are clamped with each other.

[0075] The side magnetic conductive section 342 can, on the one hand, have a magnetic field gathering effect, and on the other hand, can increase the contact area with the central magnet 32, so that the connection between the central magnet 32 ​​and the central magnetic conductive plate 34 is more stable, and the central magnet 32 ​​can be clamped between the two side magnetic conductive sections 342. The two side magnetic conductive sections 342 provide clamping force to further prevent the central magnet 32 ​​and the mass block 33 from falling.

[0076] Next, in one embodiment, the coil structure further includes a lower magnetic conductive plate 42 disposed at the lower end of the coil 41; the magnetic lines of force can be vertically attracted to the lower magnetic conductive plate 42, and the lower magnetic conductive plate 42 can also support the coil 41. The lower magnetic conductive plate 42 can cover the entire lower surface of the coil 41. At least one limiting notch 421 is provided on the lower magnetic conductive plate 42 to separate at least two protruding sections located on opposite sides of the limiting notch 421.

[0077] The elastic support member 35 can be fixed on the frame 11, the lower magnetic conductive plate 42 or some other connecting structures. Specifically, the elastic support member 35 includes a bent connecting arm 351 and two elastic arms 352 connected to the connecting arm 351. The connecting arm 351 is formed by bending along a fold perpendicular to the moving direction of the vibrator 30. In this embodiment, the fold is in the up and down direction. The two elastic arms 352 are spaced apart along the moving direction of the vibrator 30. One of the elastic arms 352 is connected to the vibrator 30, which can be fixed by welding or other methods, and the other elastic arm 352 is fixed relative to the frame 11. The other elastic arm 352 is fixed relative to the frame 11, which means that it is fixed to the frame 11, or fixed to the frame 11 through other structural members, or the elastic arm 352 is fixed to other connecting structures, and the connecting structure is relatively fixed to the frame 11. For example, the elastic arm 352 can be fixed to any one of the housing, the lower magnetic conductive plate 42 or the side magnetic circuit system. In addition, the elastic support member 35 may also be a spring. The fold of the connecting arm 351 may also be in a horizontal direction perpendicular to the moving direction of the vibrator 30 .

[0078] In order to improve the stability of the movement of the vibrator 30, in one embodiment, the sound-generating device has two elastic support members 35, and the two elastic support members 35 are arranged on two opposite sides of the vibrator 30 along the movement direction of the vibrator 30. The arrangement of the two elastic support members 35 can make the two opposite sides of the vibrator 30 both subjected to force, and the force on the vibrator 30 is more balanced, thereby achieving the stability of the movement of the vibrator 30 and reducing the shaking of the vibrator 30 in the up and down directions. In addition, the two elastic support members 35 can jointly support the vibrator 30 to prevent the bottom surface of the vibrator 30 from contacting the coil 41, which can prevent the coil 41 from hindering the back and forth movement of the vibrator 30 and prevent the vibrator 30 from colliding and damaging the coil 41.

[0079] In the above, the elastic support member 35 is fixed relative to the frame 11 and has elastic deformation along the first horizontal direction. The vibrator 30 is supported by the elastic support member 35. Therefore, during the drop reliability test of the elastic support member 35, the vibrator 30 has an active stroke in the up and down directions, that is, it generates a vibration amplitude in the up and down directions; when the vibration amplitude of the vibrator 30 in this direction is large, it is not only easy to drive the elastic support member 35 to bend and deform to a large extent, causing damage to the elastic support member 35, but also the vibrator 30 itself may collide with the vibration system and the coil structure and cause damage. Therefore, setting a limit structure to limit the up and down active stroke of the vibrator 30, that is, to limit the vibration amplitude of the vibrator 30, can solve the above problems well.

[0080] In one embodiment, the limiting structure includes a first supporting structure, which is protruding from the lower end of the vibrator 30 and / or the upper end of the coil structure, so that when the vibrator 30 moves downward, the vibrator 30 abuts against the coil structure through the first supporting structure to limit the downward movement of the vibrator 30. The first supporting structure can be a supporting column structure protruding from the lower end of the vibrator 30 and / or the upper end of the coil structure, and the supporting column structure can be integrally formed with the vibrator 30 and / or the coil structure or separately provided; taking the first supporting structure protruding from the lower end of the vibrator 30 as an example, the first supporting structure can be provided as two, and the two first supporting structures are provided on opposite sides of the vibrator 30 in the horizontal direction; the first supporting structure can also be provided as multiple, and the multiple first supporting structures are arranged at intervals along the outer circumference of the vibrator 30, and ensure that there is no interference between the vibration system and the coil structure and the interaction between the vibrator 30. The first supporting structure is used to reduce the downward movement of the vibrator 30. Therefore, when the first supporting structure is arranged at the lower end of the vibrator 30, a gap may be left between the first supporting structure and the coil structure, or the first supporting structure may be arranged to directly abut against the coil structure.

[0081] In another embodiment, the limiting structure includes a second supporting structure, and the second supporting structure is convexly arranged on the upper end of the vibrator 30 and / or the lower end of the vibration system, so that when the vibrator 30 moves upward, the vibrator 30 abuts against the vibration system through the second supporting structure, thereby limiting the upward movement of the vibrator 30. The setting of the second supporting structure can refer to the setting of the first supporting structure, and will not be described in detail here; it should be noted that in the same embodiment, the first supporting structure and the second supporting structure can be set selectively or simultaneously; when the first supporting structure and the second supporting structure are set simultaneously above and below the vibrator 30, the upward and downward movement of the vibrator 30 can be simultaneously limited.

[0082] See also Figure 1 to Figure 2In this embodiment, the limiting structure includes an upper limiting arm 51 extending downward from the lower end of the vibrator 30, and a lower limiting arm 52 extending upward from the upper end of the coil structure to be laterally opposite to the upper limiting arm 51; at the positions where the upper limiting arm 51 and the lower limiting arm 52 are opposite, one of them is provided with a limiting protrusion 521, and the other is provided with an upper stopper 511 located above the limiting protrusion 521 and / or a lower stopper 512 located below the limiting protrusion 521. It can be understood that when only the upper stopper 511 or the lower stopper 512 is provided, the upward or downward movement stroke of the vibrator 30 can be limited; when both the upper stopper 511 and the lower stopper 512 are provided, the upward and downward movement stroke of the vibrator 30 can be limited.

[0083] Specifically, take the example that the limiting protrusion 521 is provided on the lower limiting arm 52, and the upper limiting arm 51 is provided with the upper stop portion 511 and the lower stop portion 512 at the same time: when the vibrator 30 moves downward, the upper limiting arm 51 drives the upper stop portion 511 and the lower stop portion 512 to move synchronously; when the lower end surface of the upper stop portion 511 abuts against the upper end surface of the limiting protrusion 521, the limiting protrusion 521 can limit the vibrator 30 from continuing to fall, thereby preventing the elastic support The elastic support member 35 can be prevented from further deformation and the vibrator 30 can be prevented from colliding with the coil structure; on the contrary, when the vibrator 30 moves upward, the upper stop portion 511 and the lower stop portion 512 are driven to move synchronously through the upper limit arm 51; when the upper end surface of the lower stop portion 512 abuts against the lower end surface of the limiting protrusion 521, the limiting protrusion 521 can limit the vibrator 30 from continuing to move upward, thereby preventing the elastic support member 35 from continuing deformation and avoiding the vibrator 30 from colliding with the vibration system.

[0084] Similarly, taking the example that the limiting protrusion 521 is provided on the lower limiting arm 52, and the upper limiting arm 51 is also provided with the upper stop portion 511 and the lower stop portion 512, the limiting protrusion 521 can be integrally formed relative to the lower limiting arm 52, and the upper stop portion 511 and the lower stop portion 512 can be integrally formed relative to the upper limiting arm 51, for example, the limiting protrusion 521 is formed by side bending from the main part of the lower limiting arm 52; of course, they can also be separately arranged; in addition, the upper stop portion 511 and the lower stop portion 512 can be independent structures specially protruded from the main part of the upper limiting arm 51, or can be directly composed of inherent structures such as the lower end face of the vibrator 30.

[0085] It should be noted that in other embodiments, the upper limit arm 51, the lower limit arm 52, the upper stop 511, the lower stop 512 and the limit convex portion 521 can be set between the vibrator 30 and the vibration system, which can also achieve the purpose of limiting the movable travel of the vibrator 30 in the up and down directions, which will not be described in detail here. However, in this solution, the vibration system and the magnetic circuit system interact with each other to vibrate in the up and down directions. In order to avoid the interference between the setting of the limit structure and the vibration of the vibration system, it is possible to choose to set the upper limit arm 51, the lower limit arm 52, the upper stop 511, the lower stop 512 and the limit convex portion 521 between the vibrator 30 and the coil structure, which can better ensure the good operation of the sound-generating device.

[0086] Of course, there are many specific solutions for arranging the upper limit arm 51, the lower limit arm 52, the upper stopper 511, the lower stopper 512 and the limit protrusion 521 between the vibrator 30 and the coil structure. The present invention will focus on three of them for explanation:

[0087] First see Figure 1 and Figure 2 In the present invention, the outer peripheral side portion of the lower magnetic conductive plate 42 is bent upward to form the lower limit arm 52 , and the limit protrusion 521 is formed on the side portion of the lower limit arm 52 .

[0088] Based on the above, please refer to Figure 6 and Figure 7 In the first embodiment provided by the present invention, the upper limit arm 51 is formed at the lower end of the mass block 33. Generally, the lower end of the mass block 33 is closer to the lower magnetic conductive plate 42 than other structures of the vibrator 30. The upper limit arm 51 is protruded at the lower end of the mass block 33, which can reduce the protruding height of the upper limit arm 51, thereby helping to enhance the overall strength of the upper limit arm 51 and avoiding damage such as breakage during the process of limiting cooperation with the lower limit arm 52 due to the large protruding height of the upper limit arm 51.

[0089] Specifically, a clearance groove 331 may be opened at the lower end of the mass block 33; the upper limit arm 51 is protrudingly provided at the lower end of the mass block 33 adjacent to the clearance groove 331, and the upper limit arm 51 extends downward and bends toward the direction of the clearance groove 331 to form the lower stop portion 512, and the lower stop portion 512 covers a portion of the notch of the clearance groove 331. The clearance groove 331 extends along the vibration direction of the vibrator 30 to provide sufficient space for the lower limit arm 52 to move along the vibration direction of the vibrator 30, that is, to ensure that the setting of the lower limit arm 52 does not interfere with the reciprocating vibration of the vibrator 30 along the first horizontal direction; in this embodiment, the lower stop portion 512 is formed by the bending of the lower limit arm 52, and the upper stop portion 511 is formed by the bottom wall of the clearance groove 331, that is, the inherent structure of the mass block 33; the distance between the upper stop portion 511 and the lower stop portion 512 can be set to be slightly larger than the thickness of the limiting protrusion 521 in the corresponding direction, so that when the vibrator 30 reciprocates along the first horizontal direction, the friction loss between the limiting protrusion 521 and the upper stop portion 511 and the lower stop portion 512 can be reduced.

[0090] At least two upper limit arms 51 may be provided, and the two upper limit arms 51 are arranged on opposite sides of the mass block 33 in the horizontal direction; the lower limit arm 52 is suitable for the upper limit arm 51. Specifically, when a plurality of mass blocks 33 and a plurality of central magnets 32 are arranged alternately along the first horizontal direction as described above, the two upper limit arms 51 may be provided on opposite sides of the mass block 33 in the second horizontal direction to reduce interference with the magnetic action of the magnetic circuit system.

[0091] Of course, the upper limit arm 51 can be optionally set at the lower end of the central magnetic conductive plate 34. For example, the upper limit arm 51 and the central magnetic conductive plate 34 are separately set, and then fixed to the lower end of the central magnetic conductive plate 34 by bonding, snapping, etc.; or, the upper limit arm 51 and the central magnetic conductive plate 34 are integrally formed, and are formed by the outer peripheral side of the central magnetic conductive plate 34 bending downward and extending, which is easy to process and form.

[0092] Similarly, at least two upper limit arms 51 may be provided, and the two upper limit arms 51 are provided on opposite sides of the central magnetic conductive plate 34 in the horizontal direction. Specifically:

[0093] See also Figure 8 and Fig. 9In the second embodiment provided by the present invention, the two upper limit arms 51 are respectively arranged on the two opposite sides of the upper magnetic conductive section 341 in the second horizontal direction, and are separately arranged from the side magnetic conductive sections 342 which are respectively arranged on the two opposite sides of the upper magnetic conductive section 341 in the first horizontal direction. While the upper limit arm 51 and the lower limit arm 52 work together to limit the upward and downward movable stroke of the vibrator 30, the contact area with the center magnet 32 ​​is further increased, and the connection between the center magnet 32 ​​and the center magnetic conductive plate 34 is ensured to be stable.

[0094] See also Fig.10 and Fig.11 In the third embodiment provided by the present invention, two upper limit arms 51 are arranged on the opposite sides of the upper magnetic section 341 in the first horizontal direction. At this time, the limit arm can be spaced apart from the side magnetic section 342, so as to help clamp the limit center magnet 32 ​​and the mass block 33 together with the side magnetic section 342; of course, the upper limit arm 51 can also be directly formed on the side magnetic section 342, that is, the side magnetic section 342 constitutes the main part of the upper limit arm 51, and an upper stop portion 511 and / or a lower stop portion 512 is protruding from the side of the side magnetic section 342.

[0095] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sound-generating device, characterized in that: It includes a frame, an elastic support, a limit structure, and a vibration system, a magnetic circuit system and a coil structure distributed in sequence in the up and down directions, wherein: The vibration system includes a diaphragm and a voice coil, the edge of the diaphragm is fixed to the frame, and the voice coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in the up and down directions after being energized, so as to make the diaphragm vibrate and produce sound; At least part of the magnetic circuit system is supported by the elastic support member to form a vibrator, and the elastic support member has elastic deformation along a first horizontal direction; The coil structure includes a coil, the coil is fixed relative to the frame, and when energized, the coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in a first horizontal direction, so that the vibrator moves along the first horizontal direction; The limiting structure is used to limit the vertical movement of the vibrator, and the limiting structure includes: a first supporting structure protruding from the lower end of the vibrator and / or the upper end of the coil structure, so that when the vibrator moves downward, the vibrator abuts against the coil structure through the first supporting structure to limit the downward movement of the vibrator; and / or, The second supporting structure is protrudingly arranged on the upper end of the vibrator and / or the lower end of the vibration system, so that when the vibrator moves upward, it abuts against the vibration system through the second supporting structure to limit the upward movement of the vibrator.

2. A sound-generating device, characterized in that: It includes a frame, an elastic support, a limit structure, and a vibration system, a magnetic circuit system and a coil structure distributed in sequence in the up and down directions, wherein: The vibration system includes a diaphragm and a voice coil, the edge of the diaphragm is fixed to the frame, and the voice coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in the up and down directions after being energized, so as to make the diaphragm vibrate and produce sound; At least part of the magnetic circuit system is supported by the elastic support member to form a vibrator, and the elastic support member has elastic deformation along a first horizontal direction; The coil structure includes a coil, the coil is fixed relative to the frame, and when energized, the coil can interact with the magnetic field of the magnetic circuit system to generate a driving force in a first horizontal direction, so that the vibrator moves along the first horizontal direction; The limiting structure is used to limit the vertical movement of the vibrator, and the limiting structure includes an upper limiting arm extending downward from the lower end of the vibrator, and a lower limiting arm extending upward from the upper end of the coil structure to the side opposite to the upper limiting arm; At positions where the upper limit arm and the lower limit arm are opposite to each other, one of them is provided with a limit convex portion, and the other is correspondingly provided with an upper stop portion located above the limit convex portion and / or a lower stop portion located below the limit convex portion.

3. The sound-generating device according to claim 2, characterized in that: The vibrator includes a plurality of central magnets and a central magnetic conductive plate, wherein the plurality of central magnets are distributed in a horizontal direction, and the central magnetic conductive plate covers the upper surfaces of the plurality of central magnets and is fixedly connected to the plurality of central magnets; The outer peripheral side portion of the central magnetic conductive plate is bent downward to extend the upper limit arm.

4. The sound-generating device according to claim 3, characterized in that: At least two upper limit arms are provided, and the two upper limit arms are respectively arranged on two opposite sides of the central magnetic conductive plate in the horizontal direction.

5. The sound generating device according to claim 2, characterized in that: The vibrator includes a plurality of central magnets, a plurality of mass blocks and a central magnetic conductive plate, wherein the plurality of central magnets and the plurality of mass blocks are alternately distributed in a horizontal direction to jointly constitute a main structure of the vibrator, and the central magnetic conductive plate covers an upper surface of the main structure and is fixedly connected to the main structure; The upper limit arm is formed at the lower end of the mass block.

6. The sound generating device according to claim 5, characterized in that: A clearance groove is provided at the lower end of the mass block; The upper limit arm is protrudingly provided at the lower end of the mass block adjacent to the give way slot. The upper limit arm extends downward and bends toward the give way slot to form the lower stop portion, and the lower stop portion covers a portion of the notch of the give way slot.

7. The sound-generating device according to any one of claims 2 to 6, characterized in that: The coil structure also includes a lower magnetic conductive plate disposed at the lower end of the coil; The outer peripheral side portion of the lower magnetic conductive plate is bent upward to form the lower limit arm.

8. The sound-generating device according to claim 1 or 2, characterized in that: The elastic support member includes a bent connecting arm and two elastic arms connected to the connecting arm, the two elastic arms are spaced apart along the moving direction of the vibrator, one of the elastic arms is connected to the vibrator, and the other elastic arm is fixed relative to the frame.

9. An electronic device, characterized in that: Comprising a sound-generating device as described in any one of claims 1 to 8.

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