CN217011185U

CN217011185U - Sound production device and electronic equipment

Info

Publication number: CN217011185U
Application number: CN202220428493.9U
Authority: CN
Inventors: 蔡晓东; 张琳琳
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-07-19
Anticipated expiration: 2032-02-28
Also published as: WO2023159991A1

Abstract

The utility model discloses a sound generating device and an electronic device, wherein the sound generating device comprises: the vibration system comprises a vibrating diaphragm component and a voice coil connected with the vibrating diaphragm component, the vibrating diaphragm component comprises a vibrating diaphragm and a ball top, the voice coil is flat, and the axial direction of the voice coil is perpendicular to the vibration direction of the vibrating diaphragm component; the magnetic circuit system is arranged on the shell and comprises a first magnetic assembly and a second magnetic assembly which are parallel and arranged at intervals, a magnetic gap is formed between the first magnetic assembly and the second magnetic assembly, and the voice coil is inserted in the magnetic gap; the diaphragm assembly further comprises a waterproof breathable film, and the waterproof breathable film covers the air pressure balancing hole. The technical scheme of the utility model is beneficial to the heat dissipation and air pressure balance of the sound generating device.

Description

Sound production device and electronic equipment

Technical Field

The utility model relates to the technical field of electroacoustic conversion, in particular to a sound generating device and electronic equipment.

Background

The sound generating device is an important electroacoustic transducer element in electronic products, and is used for converting current signals into sound. The sound generating mechanism is usually provided with a voice coil which is located in a rear sound cavity, and in the working process, the voice coil inevitably generates heat which needs to be distributed out, and meanwhile, the inside and outside air pressure of the sound generating mechanism needs to be balanced for the vibration stability of a vibrating diaphragm of the sound generating mechanism.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a sound generating device, which aims to be beneficial to heat dissipation and air pressure balance of the sound generating device.

In order to achieve the above object, the present invention provides a sound generating device comprising:

a housing;

the vibration system is arranged on the shell and comprises a vibrating diaphragm component and a voice coil connected with the vibrating diaphragm component, the vibrating diaphragm component comprises a vibrating diaphragm and a ball top, the voice coil is flat, and the axial direction of the voice coil is perpendicular to the vibration direction of the vibrating diaphragm component;

the magnetic circuit system is arranged on the shell and comprises a first magnetic assembly and a second magnetic assembly which are parallel and arranged at intervals, a magnetic gap is formed between the first magnetic assembly and the second magnetic assembly, and the voice coil is inserted in the magnetic gap; wherein the content of the first and second substances,

the ball top is provided with an air pressure equalizing hole, the vibrating diaphragm assembly further comprises a waterproof breathable film, and the waterproof breathable film covers the air pressure equalizing hole.

Optionally, the air pressure equalizing hole is provided in plurality on the dome.

Optionally, a plurality of said air pressure equalizing holes are arranged in a plurality of rows on said dome.

Optionally, a reinforcing rib is arranged on the top of the ball, and the air pressure balancing hole avoids the reinforcing rib.

Optionally, the reinforcing rib extends along an arc extending direction of the dome, and at least one row of the air pressure equalizing holes is respectively arranged on two opposite sides of the reinforcing rib.

Optionally, the waterproof breathable film is disposed on a side of the diaphragm assembly away from the magnetic circuit system.

Optionally, the first magnetic assembly includes a plurality of first magnets and a first magnetic conductive plate, which are stacked, and a magnetizing direction of the first magnet is the same as a vibration direction of the diaphragm, and magnetizing directions of any two adjacent first magnets are opposite to each other;

the second magnetic assembly is provided with a second magnet and a second magnetic conduction plate corresponding to each first magnet and each first magnetic conduction plate, and the magnetizing direction of the second magnet is opposite to that of the first magnet opposite to the second magnet.

The utility model also proposes an electronic device comprising:

the equipment shell is provided with a sound outlet; and

in the sound production device, the diaphragm component is arranged corresponding to the sound outlet.

Optionally, a dust screen is further arranged between the device shell and the sound generating device, and the dust screen covers the sound outlet.

Optionally, the electronic device is a smart watch or a smart bracelet.

According to the technical scheme, the air pressure balancing hole is directly formed in the top of the ball, so that heat dissipation and air pressure balancing of the sound generating device are facilitated; in addition, the waterproof performance of the sound generating device can be improved by covering the air pressure equalizing hole with a waterproof breathable film; moreover, the voice device of the utility model adopts the flat voice coil, can realize better acoustic performance under the condition of smaller generating device volume, is beneficial to the miniaturization of the voice device and is beneficial to the use of the voice device on an electronic device with smaller volume.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an exploded view of an embodiment of the sound generating device of the present invention; wherein, the voice coil and the magnetic circuit system are hidden;

FIG. 2 is a schematic view of the sound generating device of FIG. 1 from another perspective;

FIG. 3 is a schematic cross-sectional view of the sound generator of FIG. 1;

FIG. 4 is a schematic structural diagram of an electronic device according to an embodiment of the utility model;

fig. 5 is a schematic partial cross-sectional structure diagram of the electronic device in fig. 4.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Equipment case	100	Sound outlet
101	Abutting convex part	2	Sound producing device
				21	Vibrating diaphragm	22	Ball top
20	Air pressure equalizing hole	23	Shell body
				231	Upper casing	232	Lower case
24	Waterproof breathable film	25	Voice coil
				26	Magnetic conductive yoke	271	First magnetic assembly
271a	First magnet	272	Second magnetic assembly
				272a	Second magnet	28	Dust-proof net
291	First magnetic conduction plate	292	Second magnetic conduction plate
				233	Mounting boss	221	Reinforcing rib

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a sound production device.

Referring to fig. 1 to 5, in an embodiment of the present invention, the sound generating device 2 includes:

a housing 23;

the vibration system is arranged on the shell 23 and comprises a vibrating diaphragm component and a voice coil 25 connected with the vibrating diaphragm component, the vibrating diaphragm component comprises a vibrating diaphragm 21 and a ball top 22, the voice coil 25 is flat, and the axial direction of the voice coil 25 is perpendicular to the vibration direction of the vibrating diaphragm component;

the magnetic circuit system is arranged in the shell 23 and comprises a first magnetic assembly 271 and a second magnetic assembly 272 which are arranged in parallel and at intervals, a magnetic gap is formed between the first magnetic assembly 271 and the second magnetic assembly 272, and the voice coil 25 is inserted into the magnetic gap; wherein the content of the first and second substances,

the dome 22 is provided with an air pressure equalizing hole 20, the diaphragm assembly further comprises a waterproof breathable film 24, and the waterproof breathable film 24 covers the air pressure equalizing hole 20.

According to the technical scheme, the air pressure balancing hole 20 is directly formed in the ball top 22, so that heat dissipation and air pressure balancing of the sound generating device 2 are facilitated; in addition, the waterproof performance of the sound generating device 2 can be improved by covering the air pressure equalizing hole 20 with the waterproof air-permeable film 24; moreover, the sound generating device of the present invention employs the flat voice coil 25, which can realize better acoustic performance with a smaller volume of the sound generating device 2, and is beneficial to miniaturization of the sound generating device 2, so as to be beneficial to use of the sound generating device 2 in an electronic device with a smaller volume.

Optionally, the diaphragm 21 is disposed in an arc shape. In this embodiment, for the sound generating apparatus 2, the sound emitting side and the rear sound cavity are respectively formed on two opposite sides of the diaphragm assembly, the diaphragm 21 protrudes in the direction away from the rear sound cavity, and the air pressure equalizing hole 20 is communicated with the rear sound cavity. It can be understood that to electronic equipment such as intelligent wrist-watch, intelligent bracelet, its equipment shell 10 mostly is circular or oval, or possesses one section or the curved lateral wall of multistage at least, and the vibrating diaphragm 21 that is the arc setting is favorable to laminating mutually with the arc wall section on these equipment shells 10 to fill and to utilize electronic equipment's the space of arc shell part. This embodiment is through being curved vibrating diaphragm 21's setting, and the space of ability make full use of electronic equipment arc shell part is not increasing electronic equipment volume and shape, not changing under the condition of sound generating mechanism 2 occupation space for voice coil loudspeaker voice coil 25's vibration space is bigger, vibrating diaphragm 21's vibration range is bigger, thereby promotes sound generating mechanism 2's acoustic performance.

Optionally, the magnetic circuit system further includes a magnetic yoke 26, and the first magnetic assembly 271 and the second magnetic assembly 272 are both disposed on the magnetic yoke 26. Optionally, the surface of the magnetic yoke 26 facing away from the diaphragm 21 is disposed in a plane, so as to facilitate stable installation of the sound generating device 2 on an electronic device.

Further, a plurality of the air pressure equalizing holes 20 are formed in the dome 22. It can be understood that, compared with one air pressure equalizing hole 20, the area of the plurality of air pressure equalizing holes 20 is larger, which is more beneficial to heat dissipation and air pressure equalization, and meanwhile, even if some air pressure equalizing holes 20 are blocked, the heat dissipation and air pressure equalization can be performed through the rest air pressure equalizing holes 20, thereby improving the reliability of the product. Optionally, a plurality of the pressure equalizing holes 20 are arranged in multiple rows on the dome 22, which is beneficial to spreading the plurality of pressure equalizing holes 20 on the dome 22, so that heat at different positions can be dissipated nearby, and in an embodiment where the pressure equalizing holes 20 are formed by stamping, only one row of stamping pins can be arranged, i.e. multiple rows of the pressure equalizing holes 20 can be stamped in sequence, so as to reduce the number of the stamping pins while considering higher stamping efficiency.

Furthermore, a reinforcing rib 221 is arranged on the dome 22 to improve the strength of the dome 22. Optionally, the air pressure equalizing hole 20 is arranged to be free from the reinforcing rib 221, so as to prevent the opening of the air pressure equalizing hole 20 from affecting the strength of the ball top 22.

Optionally, the stiffening rib 221 extends in the direction of the arc extension of the dome 22. It will be appreciated that the dome 22 is generally elongated in the arc-shaped extension direction of the dome 22, i.e., the ribs 221 extend along the length of the dome 22, so that the dome 22 can be reinforced in the length direction which is easier to deform. Further optionally, at least one row of the air pressure equalizing holes 20 is respectively arranged on two opposite sides of the reinforcing rib 221, so as to avoid the reinforcing rib 221 and facilitate the distributed arrangement of the air pressure equalizing holes 20 on the ball top 22.

Furthermore, the waterproof breathable film 24 is adhered to the dome 22 in a manner that not only can the two parts be connected, but also the two connected parts can be sealed, so as to further improve the waterproof performance of the product.

Optionally, the waterproof breathable membrane 24 is disposed on a side of the diaphragm assembly away from the magnetic circuit system, that is, the waterproof breathable membrane 24 is located outside the dome 22. It can be understood that the outer side of the dome 22 is generally flat, which is suitable for the fitting of the waterproof breathable film 24 and is convenient for replacing the waterproof breathable film 24.

In the present invention, it is understood that the housing 23 not only provides a mounting attachment for the diaphragm 21, but also provides protection for the diaphragm 21. In this embodiment, the housing 23 is also disposed in an arc shape corresponding to the arc-shaped diaphragm 21, so that the two are mounted in a matching manner. Optionally, the housing 23 includes an upper shell 231 and a lower shell 232, and the diaphragm 21 is integrally connected to the upper shell 231, so that during assembly, after the lower shell 232 is disposed in the magnetic circuit system, the integrated diaphragm 21 and the upper shell 231 are modularly mounted to the lower shell 232, so that the modular mounting of the product is realized, and the assembly efficiency is improved. Further optionally, the vibrating diaphragm 21 and the upper shell 231 can be connected into a whole in a hot pressing or injection molding manner, so that on one hand, seamless combination between the vibrating diaphragm 21 and the upper shell 231 can be achieved, waterproof capability is improved, high-grade waterproof requirements are met, on the other hand, the assembling process of materials can be simplified, manpower and material resources are saved, on the other hand, the combination force between the vibrating diaphragm 21 and the upper shell 231 is large, and the vibrating diaphragm is not easy to separate and fail.

Further, referring to fig. 3, the first magnetic assembly 271 includes two first magnets 271a and two first magnetic conductive plates 291, which are stacked, wherein the magnetizing direction of the first magnets 271a is the same as the vibration direction of the diaphragm 21, and the magnetizing directions of the two first magnets 271a are opposite; the second magnetic component 272 is provided with a second magnet 272a and a second magnetic conduction plate 292 corresponding to each first magnet 271a and each first magnetic conduction plate 291, and the magnetizing direction of the second magnet 272a is opposite to that of the first magnet 271a opposite to the second magnet 272 a; the voice coil 25 has two straight sections which are arranged at intervals in the vibration direction of the diaphragm 21 and have opposite current directions, one of the straight sections is located in a magnetic gap formed by a pair of first magnetic conduction plate 291 and second magnetic conduction plate 292 which are close to one end of the diaphragm 21, and the other straight section is located in a magnetic gap formed by the other pair of first magnetic conduction plate 291 and second magnetic conduction plate 292 which are far away from one end of the diaphragm 21, so that the driving force received by the voice coil 25 is large and the vibration starting speed is high. However, the design is not limited thereto, and in other embodiments, only one first magnet 271a and one second magnet 272a may be provided, and the voice coil 25 may be provided between the first magnet 271a and the second magnet 272 a; in yet other embodiments, three or more first magnets 271a may be further provided, and for the three or more first magnets 271a, the magnetizing directions of any two adjacent first magnets 271a are opposite, and the number and the positions of the second magnets 272a are correspondingly arranged, in which case, the number of the voice coils 25 is correspondingly increased, one voice coil 25 may be disposed between each pair of the first magnets 271a and the second magnets 272a, and the plurality of voice coils 25 are sequentially arranged along the vibration direction of the diaphragm 21 and are sequentially fixed together.

The present invention further provides an electronic device, referring to fig. 1 to 5, the electronic device includes a device housing 10 and a sound generating device 2, the specific structure of the sound generating device 2 refers to the above embodiments, and since the electronic device adopts all technical solutions of all the above embodiments, the electronic device at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. Wherein, the device shell 10 is provided with a sound outlet 100; the vibrating diaphragm component of the sound generating device 2 is arranged corresponding to the sound outlet 100 so as to generate sound. It is understood that the air pressure equalizing hole 20 is also disposed corresponding to the sound outlet 100, so as to perform heat dissipation and air pressure equalization sequentially through the air pressure equalizing hole 20 and the sound outlet 100.

Further, the side wall of the device housing 10 at least includes an arc-shaped wall section, and the sound outlet 100 is opened on the arc-shaped wall section. The sound generating device 2 is mounted on the arc-shaped wall section in a fitting manner, that is, the housing 23 and the diaphragm 21 are mounted on the arc-shaped wall section in a fitting manner. It should be noted that the electronic device may be, but not limited to, a smart watch, a smart bracelet, and the like, and the device case 10 may be circular or oval, in which case, the entire side wall of the device case 10 is arc-shaped, and of course, the device case 10 may also have only one or multiple arc-shaped side walls, for example, but not limited to, both ends in the length direction are flat, and both sides in the width direction are arc-shaped.

Further, the electronic device further comprises a dust screen 28, and the dust screen 28 at least covers the air pressure equalizing hole 20 to reduce the risk that dirt such as dust blocks the air pressure equalizing hole 20. Optionally, the dust screen 28 also covers the diaphragm 21 to reduce the risk that dirt such as dust adheres to the diaphragm 21 to affect the vibration of the diaphragm 21; it will be appreciated that in this case, the dust screen 28 is typically arranged to cover the entire sound outlet 100.

In the present invention, the dust screen 28 is disposed between the device case 10 and the sound generating device 2. Specifically, the dust screen 28 may be attached to the housing 23 only, may be attached to the device case 10 only, or may be attached to both the housing 23 and the device case 10.

Optionally, a mounting protrusion 233 is disposed on the housing 23, and the dust screen 28 is mounted on the mounting protrusion 233 to be attached to the housing 23. In this embodiment, the mounting protrusions 233 are generally disposed near the edge of the dust screen 28, so that the edge of the dust screen 28 is restricted from rolling toward the middle by the mounting protrusions 233. Further optionally, at least one mounting protrusion 233 is respectively disposed at two ends of the housing 23 along the arc-shaped extending direction of the diaphragm 21, so as to at least limit the two ends of the dust screen 28 from being curled toward the middle, and improve the assembling reliability of the dust screen 28. Optionally, the air pressure equalizing hole 20 is formed on one side of one of the mounting protrusions 233 adjacent to the other mounting protrusion 233, so as to ensure that the dust screen 28 can cover the air pressure equalizing hole 20.

Optionally, the device housing 10 is provided with an abutting convex portion 101 on the sound outlet 100, and the abutting convex portion 101 abuts against the dust screen 28 on the housing 23; it is understood that in this embodiment, the dust screen 28 is clamped between the device case 10 and the housing 23.

Of course, in other embodiments, the dust screen 28 may also be, but is not limited to, adhered to the housing 23 and/or the device case 10.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sound generating device, comprising:

a housing;

2. The sound generating apparatus as claimed in claim 1, wherein said air pressure equalizing hole is provided in plural on said dome.

3. The apparatus according to claim 2, wherein a plurality of said pressure equalization holes are arranged in a plurality of rows on said dome.

4. The sound generating apparatus of claim 1, wherein said dome has a rib, and said air pressure equalizing hole is formed to be spaced from said rib.

5. The sound generating apparatus as claimed in claim 4, wherein said reinforcing rib extends in an arc-shaped extension direction of said dome, and at least one row of said air pressure equalizing holes is provided on each of opposite sides of said reinforcing rib.

6. The sound-emitting device according to claim 1, wherein the waterproof air-permeable membrane is disposed on a side of the diaphragm assembly away from the magnetic circuit system.

7. The sound production device according to any one of claims 1 to 6, wherein the first magnetic assembly includes a plurality of first magnets and first magnetic conductive plates, which are stacked, and the first magnets are magnetized in the same direction as the vibration direction of the diaphragm, and the magnetizing directions of any two adjacent first magnets are opposite;

8. An electronic device, comprising:

the equipment shell is provided with a sound outlet; and

the sound generating apparatus according to any one of claims 1 to 7, wherein the diaphragm assembly is disposed corresponding to the sound outlet.

9. The electronic device of claim 8, wherein a dust screen is further disposed between the device housing and the sound generating device, and the dust screen covers the sound outlet.

10. The electronic device of claim 8 or 9, wherein the electronic device is a smart watch or a smart bracelet.