WO2020113742A1

WO2020113742A1 - Sound producing device and electronic apparatus

Info

Publication number: WO2020113742A1
Application number: PCT/CN2018/125605
Authority: WO
Inventors: 翟成祥
Original assignee: 歌尔股份有限公司
Priority date: 2018-12-06
Filing date: 2018-12-29
Publication date: 2020-06-11
Also published as: CN209017233U

Abstract

Disclosed are a sound producing device and an electronic apparatus. The sound producing device comprises a housing, a vibration system, a front cover, and a metal plate. The housing has an opening. The vibration system is disposed in the housing. The front cover covers the opening of the housing. The front cover is a metal piece, and is an annular structure having a central opening. An inner peripheral wall of the front cover is formed to have multiple ascending steps in a direction adjacent to the housing. The metal plate is adhered or laser-welded to a surface of the front cover facing away from the housing, and is configured to cover the central opening of the front cover. A sound output hole is provided at the metal plate and corresponds to the central opening of the front cover. The technical solution of the present utility model can reduce manufacturing costs of sound producing devices.

Description

Sounding device and electronic equipment

Technical field

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

Background technique

Generally, in a sound emitting device, the open end cover of the housing is provided with a front cover and a metal plate. For example, in some examples, as shown in FIG. 1, the metal plate 30' is provided on the front cover 20', and the metal plate 30' It is integrally injection-molded with the front cover 20' as an insert. Since the metal plate 30' also has better strength when it is thinner, it can play a better role in protecting the vibration system together with the front cover 20'. However, since the metal plate 30' is injection-molded with the front cover 20' as an insert, the metal plate 30' needs to be inserted into the mold every time it is injection-molded, and the operation is complicated, resulting in a great increase in cost.

Utility model content

The main purpose of the utility model is to propose a sounding device, aiming to reduce the production cost.

In order to achieve the above purpose, the sound generating device proposed by the present invention includes:

The shell has an opening;

The vibration system is set in the housing;

A front cover, the cover is provided at the opening of the housing, the front cover is a metal piece, and the front cover is a ring structure with an opening in the middle, and the inner peripheral wall of the front cover is in a direction close to the housing Ascending multi-stage ladder-like setting; and

The metal plate is glued or laser welded to the surface of the front cover facing away from the housing, and is arranged to cover the middle opening of the front cover, and the metal plate is provided corresponding to the middle opening of the front cover Sound hole.

Optionally, the vibration system includes a diaphragm, the diaphragm includes a central portion, a folded ring portion disposed around the central portion, and a fixed portion disposed around the folded ring portion, the fixed portions are respectively The front cover is bonded to the housing.

Optionally, the front cover has an adhesive surface facing the housing, the adhesive surface is bonded to the fixing portion, and the projection of the adhesive surface on the fixing portion is located in the fixing portion .

Optionally, the inner peripheral wall of the front cover includes a plurality of stepped surfaces, the plurality of stepped surfaces are arranged along an opening direction of the middle opening of the front cover, and the stepped surfaces are along the middle opening of the front cover A plurality of the stepped surfaces include a first stepped surface connected to the adhesive surface, and the first stepped surface gradually extends outward in a direction close to the housing.

Optionally, the housing has a supporting surface disposed around the opening of the housing, the supporting surface faces the bonding surface and is bonded to the fixing portion, and the inner edge of the supporting surface is The inside edge of the bonding surface is flush.

Optionally, the projection area of the middle opening of the front cover on the diaphragm is larger than the area of the central portion.

Optionally, the front cover is made of copper.

Optionally, the metal plate is a steel plate.

Optionally, the front cover and the metal plate are bonded by glue or double-sided adhesive.

The utility model also proposes an electronic device, including a sound-generating device. The sound-generating device includes:

The shell has an opening;

The vibration system is set in the housing;

The front cover is provided to cover the opening of the housing. The front cover is a metal part, and the front cover is a ring structure with an intermediate opening. In the direction close to the housing, the inner peripheral wall of the front cover is Ascending multi-stage ladder-like setting; and

The metal plate is adhered to the surface of the front cover facing away from the housing, and covers the middle opening of the front cover. The metal plate and the middle opening of the front cover are provided with sound holes.

The technical solution of the utility model divides the front cover and the metal plate into two independent parts, and the metal plate and the front cover are bonded or laser welded, only the front cover and the metal plate are processed separately, and then the metal plate and the metal plate are processed separately. The front cover can be fixed. Compared with the integral injection molding of the metal plate and the front cover, the scheme of the utility model is simpler and more convenient. In addition, since there is no need to use an injection mold to achieve the connection between the two, the production cost of the sounding device can be greatly reduced. At the same time, when the inner peripheral wall of the front cover is arranged in a multistage stepped manner in the direction close to the housing, the wall thickness of the front cover gradually increases, which can increase the strength of the front cover. In addition, the inner peripheral wall of the front cover gradually avoids the connection between the folding ring part and the fixing part of the diaphragm, which makes the vibration space of the diaphragm larger, and can ensure that the diaphragm has a better vibration effect. Furthermore, the area of the surface of the front cover facing away from the housing is greater, and the contact area between the front cover and the metal plate is greater, which can enhance the bonding effect of the front cover and the metal plate, making the bonding of the metal plate more stable.

BRIEF DESCRIPTION

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description It is only some embodiments of the present invention. For those of ordinary skill in the art, without paying any creative labor, other drawings can be obtained according to the structures shown in these drawings.

FIG. 1 is a schematic structural view of an example sound-generating device;

FIG. 2 is a schematic structural diagram of an embodiment of a sound-generating device of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2.

Description of drawings

标号Label	名称 name	标号Label		名称name
1010	外壳 shell	3131	出声孔 Sound hole
1111	支撑面 Support surface	4040	振膜 Diaphragm
20/20＇20/20'	前盖The front cover	4141	固定部Fixed part
21twenty one	粘接面 Bonding surface	4242	折环部Fold ring
22twenty two	第一阶梯面 First step surface	4343	中心部 Center
30/30＇30/30'	金属板Metal plate	A	A

The realization, functional characteristics and advantages of the utility model will be further described in conjunction with the embodiments and with reference to the drawings.

detailed description

The technical solutions in the embodiments of the present invention will be described clearly and completely in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all Examples. Based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indicator (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indicator is only used to explain a specific posture (as shown in the figure (Shown) the relative positional relationship between the various components, the movement, etc., if the specific posture changes, the directional indication will change accordingly.

In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are for descriptive purposes only, and cannot be understood as instructions or It implies its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined with "first" and "second" may include at least one of the features either explicitly or implicitly. In addition, the meaning of “and/or” appearing throughout the text is to include three parallel plans, taking “A and/or B as an example”, including plan A, or plan B, or plans that both A and B satisfy. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of those skilled in the art to realize. When the combination of technical solutions contradicts or cannot be realized, it should be considered that the combination of such technical solutions does not exist , Nor within the scope of protection required by this utility model.

The utility model proposes a sound-emitting device, which is used in electronic equipment, wherein the electronic equipment may be a mobile phone, a tablet computer, a headset or other equipment capable of sound-producing.

In the embodiment of the present invention, please refer to FIG. 2 and FIG. 3, the sound generating device includes:

The housing 10 has an opening;

The vibration system is set in the housing 10;

The front cover 20 is provided at the opening of the housing 10, the front cover 20 is a metal piece, and the front cover 20 is a ring structure with an intermediate opening. In the direction close to the housing 10, the inner peripheral wall of the front cover 20 is much raised Stepped setting; and

The metal plate 30 is adhered to the surface of the front cover 20 facing away from the housing 10 and covers the middle opening of the front cover 20. The sound hole 31 is provided on the metal plate 30 and corresponding to the middle opening of the front cover 20. In other embodiments, the metal plate may also be laser welded to the surface of the front cover 20 facing away from the housing 10.

In this embodiment, when the metal plate 30 is bonded to the front cover 20, the sound hole 31 communicates with the middle opening of the front cover 20, and the sound generated by the vibration of the vibration system can be transmitted through the sound hole 31. The shape of the front cover 20 can be various, for example, the front cover 20 has a circular ring shape, a square ring shape, or other types of ring structures.

In this embodiment, the inner peripheral wall of the front cover 20 is arranged in a multi-stage stepped manner in the direction close to the housing 10, specifically, the inner diameter of the front cover 20 gradually becomes larger in the direction close to the housing 10, Therefore, the vibration space near the diaphragm 40 is made larger to meet the requirement of the vibration space of the diaphragm 40. In addition, the inner peripheral wall of the front cover 20 may have two steps, three steps, or more steps.

Generally, in some examples, referring to FIG. 1, the metal plate 30 ′ and the front cover 20 ′ are integrally injection-molded by an injection mold, and the metal plate 30 ′ is first placed in the injection mold as an insert, which makes the structure of the mold more complicated The cost of the mold is high, and during injection molding, the metal plate 30' needs to be inserted into the mold for each molding, which complicates the operation and greatly increases the production cost. In this solution, referring to FIG. 2 and FIG. 3, the front cover 20 and the metal plate 30 are divided into two separate parts, and the metal plate 30 and the front cover 20 are bonded, and only the front cover 20 and the metal plate 30 is processed separately, and then the metal plate 30 and the front cover 20 can be bonded. Compared with the integral injection molding of the metal plate 30 and the front cover 20, the connection by the bonding method is simpler and more convenient. In addition, since there is no need to use an injection mold to achieve the connection between the two, the production cost of the sounding device can be greatly reduced. At the same time, when the inner peripheral wall of the front cover 20 is arranged in a multistage stepped manner in the direction close to the housing 10, the wall thickness of the front cover 20 gradually increases, and the strength of the front cover 20 can be increased. In addition, the inner peripheral wall of the front cover 20 gradually avoids the connection between the folded portion 42 and the fixing portion 41 of the diaphragm 40, so that the vibration space of the diaphragm 40 is larger, and the diaphragm 40 can be guaranteed to have a better Vibration effect. Furthermore, the area of the surface of the front cover 20 facing away from the housing 10 is greater, and the contact area of the front cover 20 and the metal plate 30 is greater, which can enhance the bonding effect of the front cover 20 and the metal plate 30, making the metal plate 30 bonding is more stable.

In this embodiment, the vibration system includes a diaphragm 40. The diaphragm 40 includes a central portion 43, a folded ring portion 42 disposed around the central portion 43, and a fixed portion 41 disposed around the folded ring portion 42. The fixed portion 41 is clamped to the front cover 20 and the housing 10, and the fixing portion 41 is adhered to the front cover 20 and the housing 10, respectively. Specifically, the fixed portion 41 is the outer peripheral portion of the diaphragm 40, and the folded portion 42 and the center portion 43 are connected to each other in order toward the center of the diaphragm 40. After the front cover 20 is placed on the housing 10, a housing space is formed between the front cover 20 and the housing 10, and the folding portion 42 and the center portion 43 are located in the housing space.

In this embodiment, the front cover 20 has an adhesive surface 21 facing the housing 10. The adhesive surface 21 is bonded to the fixing portion 41. The projection of the adhesive surface 21 on the fixing portion 41 is located in the fixing portion 41. In other words, the projected area of the adhesive surface 21 on the fixing portion 41 is smaller than the area of the fixing portion 41. In this way, the front cover 20 only contacts the fixing portion 41 and does not contact the junction of the folding portion 42 and the fixing portion 41 In contact, the front cover 20 does not block the connection between the folding ring portion 42 and the fixing portion 41, so that the vibration of the folding ring portion 42 is not affected, so that the diaphragm 40 has a better vibration effect.

In this embodiment, the housing 10 has a supporting surface 11 surrounding the opening of the housing 10. The supporting surface 11 is disposed toward the adhesive surface 21 and is bonded to the fixing portion 41. The inner edge of the adhesive surface 21 and the supporting surface 11 The inside edge of the is flush. It can be understood that when the fixing portion 41 is clamped by the front cover 20 and the housing 10, the connection between the fixing portion 41 and the folding ring portion 42 is in a suspended state, so that the front cover 20 can avoid interference to the connection and affect vibration. Vibration of the membrane. In addition, assuming that the inner edge of the adhesive surface 21 is closer to the folded portion 42 than the inner edge of the supporting surface 11, the contact area of the fixing portion 41 and the adhesive surface 21 is larger than the contact area of the fixing portion 41 and the supporting surface 11, In this way, the connection between the fixing portion 41 and the folded ring portion 42 will be excessively interfered by the front cover 20 during vibration, thereby affecting the vibration effect of the diaphragm 40. When the inner edge of the adhesive surface 21 is further away from the folded portion 42 than the inner edge of the support surface 11, the contact area of the fixing portion 41 and the adhesive surface 21 is reduced, resulting in a lack of fixing effect of the fixing portion 41 it is good. In the embodiment of the present invention, setting the inner edge of the bonding surface 21 to be flush with the inner edge of the supporting surface 11 can avoid the above-mentioned problems, can ensure that the vibration performance of the diaphragm 40 is better, and can also avoid The diaphragm 40 deforms unevenly when vibrating, resulting in a reduced life of the diaphragm 40.

In this embodiment, the inner peripheral wall of the front cover 20 includes a plurality of stepped surfaces. The plurality of stepped surfaces are arranged along the opening direction of the middle opening of the front cover 20, and the stepped surfaces extend along the opening direction of the middle opening of the front cover 20. Each stepped surface includes a first stepped surface 22 connected to the adhesive surface 21, and the first stepped surface 22 gradually extends outward in a direction close to the housing 10. Specifically, since the inner peripheral wall of the front cover 20 is arranged in multiple steps, the inner peripheral wall of the front cover 20 has a plurality of stepped surfaces, and the plurality of stepped surfaces all extend toward the housing 10, wherein the first stepped surface 22 is connected to the adhesive surface 21, and the first stepped surface 22 is gradually inclined outward in a direction close to the housing 10, that is, the angle between the first stepped surface 22 and the adhesive surface 21 is an obtuse angle. It can be understood that when the diaphragm 40 is bonded to the front cover 20, the front cover 20 is placed so that the bonding surface 21 faces upward, and after adding an adhesive such as glue to the bonding surface 21, the fixing portion 41 is bonded to the The interface 21 is attached. When the fixing portion 41 is adhered to the adhesive surface 21, in order to ensure that the fixing portion 41 can be better adhered to the adhesive surface 21, more adhesives such as glue are used to adhere the fixing portion 41 On the bonding surface 21, the excess glue will overflow to the fold 42, and the first stepped surface 22 is gradually inclined outward, so that the excess glue flows along the first stepped surface 22 to the next level On the stepped surface, excess glue can be prevented from flowing to the folded ring portion 42, and the folded ring portion 42 can be prevented from being bonded to the front cover 20 to make the vibration effect of the diaphragm 40 poor. In addition, when the area of the bonding surface 22 is the same, compared with the first stepped surface 22 is provided as a straight wall, the first stepped surface 22 is gradually extended outward in the direction close to the housing 10, which can make the front cover 20 The thicker wall can increase the strength of the front cover 20, and can avoid the vibration range of the diaphragm 40 and increase the vibration space. Of course, in other embodiments, the fixing portion 41 and the front cover 20 may also be sol-bonded or shadow-free glue-bonded.

In this embodiment, the front cover 20 and the diaphragm 40 are first bonded to form a first component, and then the first component is bonded and fixed to the voice coil of the vibration system and the housing 10, and then the metal plate 30 is bonded to the front cover 20 on. The projection area of the middle opening of the front cover 20 on the diaphragm 40 is larger than the area of the central portion 43, which is convenient for assembly with other components. In addition, since the fixing portion 41 is directly bonded to the front cover 20, there is no need to bond the fixing portion to the steel ring as shown in FIG. 1, and then the steel ring is bonded to the front cover 20'. The sound-emitting device of the utility model can omit the steel ring, which can greatly simplify the overall structure of the sound-emitting device and make the overall structure of the sound-emitting device more compact.

In this embodiment, the front cover 20 is made of copper. Specifically, copper has better workability. When the front cover 20 is made of copper, it is easier to process the front cover 20. In addition, copper can be recycled many times without affecting its mechanical properties, which can greatly save resources . Of course, in other embodiments, the front cover 20 may also be made of aluminum, steel, or iron.

In this embodiment, the metal plate 30 is a steel plate. It can be understood that the metal plate 30 has the function of protecting the vibration system, so the metal plate 30 is required to have good strength and rigidity. In addition, the structure of the sound generating device should be ensured to be compact, so the metal plate 30 should be as thin as possible. The steel plate has higher strength and stiffness. Even when the steel plate is thinner, it has better strength and stiffness and is not easily deformed, which can better protect the vibration system. Of course, in other embodiments, the metal plate 30 may also be an aluminum alloy plate, a magnesium alloy plate, an iron plate, or the like.

In this embodiment, the front cover 20 and the metal plate 30 are adhered by glue or double-sided adhesive. Specifically, when the front cover 20 and the metal plate 30 are bonded with glue or double-sided tape, the bonding strength can meet the requirements, the use is relatively convenient, and the cost is also low.

The utility model also proposes an electronic device, which includes a sound-generating device. The specific structure of the sound-generating device refers to the above-mentioned embodiments. Since this electronic device adopts all the technical solutions of all the above-mentioned embodiments, it has at least the All the beneficial effects brought by the technical solution will not be repeated here.

The above is only the preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structural transformations made by using the specification and drawings of the utility model under the inventive concept of the utility model, or Direct/indirect applications in other related technical fields are included in the patent protection scope of the utility model.

Claims

A sounding device, characterized in that it includes:

The shell has an opening;

The vibration system is set in the housing;

A front cover, the cover is provided at the opening of the housing, the front cover is a metal piece, and the front cover is a ring structure with an opening in the middle, and the inner peripheral wall of the front cover is in a direction close to the housing Ascending multi-stage ladder-like setting; and

The metal plate is glued or laser welded to the surface of the front cover facing away from the housing, and is arranged to cover the middle opening of the front cover, and the metal plate is provided corresponding to the middle opening of the front cover Sound hole.
The sound generating device according to claim 1, wherein the vibration system includes a diaphragm including a central portion, a folded ring portion disposed around the central portion, and a fixed portion disposed around the folded ring portion The fixing portion is bonded to the front cover and the casing, respectively.
The sound emitting device according to claim 2, wherein the front cover has an adhesive surface facing the housing, the adhesive surface is bonded to the fixing portion, and the adhesive surface is at the The projection on the fixed part is located in the fixed part.
The sound generating device according to claim 3, wherein the inner peripheral wall of the front cover includes a plurality of stepped surfaces, the plurality of stepped surfaces are arranged along an opening direction of a middle opening of the front cover, and the The stepped surface extends along the opening direction of the middle opening of the front cover, and the plurality of stepped surfaces includes a first stepped surface connected to the adhesive surface, the first stepped surface is in a direction close to the housing Gradually extend outward.
The sound generating device according to claim 3, wherein the housing has a supporting surface disposed around the opening of the housing, the supporting surface faces the bonding surface and is bonded to the fixing portion , The inner edge of the support surface is flush with the inner edge of the bonding surface.
The sound generating device according to claim 2, wherein the projection area of the middle opening of the front cover on the diaphragm is larger than the area of the central portion.
The sound generating device according to any one of claims 1 to 6, wherein the front cover is made of copper.
The sound generating device according to any one of claims 1 to 6, wherein the metal plate is a steel plate.
The sound generating device according to any one of claims 1 to 6, wherein the front cover and the metal plate are bonded by glue or double-sided adhesive.
An electronic device, characterized in that it comprises the sound generating device according to any one of claims 1 to 9.