CN218679344U

CN218679344U - Sound production device and electronic equipment

Info

Publication number: CN218679344U
Application number: CN202222368409.1U
Authority: CN
Inventors: 张怀省; 张锋; 赵国栋
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-03-21
Anticipated expiration: 2032-09-06

Abstract

The utility model discloses a sound generating device and an electronic device, wherein, the sound generating device comprises a shell, and the shell is provided with an inner cavity; the sound production single body is arranged in the inner cavity, the vibrating diaphragm of the sound production single body divides the inner cavity into a front sound cavity and a rear sound cavity, and the shell is provided with a sound outlet communicated with the front sound cavity; the metal isolating piece is arranged in the rear sound cavity, and separates a sound absorbing cavity from the rear sound cavity, and sound absorbing particles are filled in the sound absorbing cavity; the metal isolating piece comprises a fixing plate and a ventilating plate, the fixing plate and the ventilating plate are arranged in an included angle, the fixing plate is fixed on the inner wall of the shell, the ventilating plate isolates the sound absorbing cavity, the ventilating plate is provided with a plurality of air holes, and the aperture of each air hole is smaller than the particle size of sound absorbing particles; the technical scheme of the utility model can promote sound generating mechanism's acoustic performance.

Description

Sound production device and electronic equipment

Technical Field

The utility model relates to an acoustic energy conversion technology field, in particular to sound generating mechanism and applied this sound generating mechanism's electronic equipment.

Background

With the social and economic development and the upgrading of consumption, consumers have higher requirements on electronic equipment such as mobile phone audio performance indexes, and more mobile phone space is needed for sound cavity design, but the contradiction is that the client side also requires that the mobile phone is as light and thin as possible, the holding hand feeling is improved, and the mobile phone is convenient to carry, so that the expansion of the sound cavity space is limited, and even needs to be compressed.

In order to enlarge the volume of the sound cavity, sound absorption particles are generally filled in the sound cavity, and the equivalent volume of the audio rear cavity is increased under the condition that the physical volume of the sound cavity is not enlarged. In order to prevent the sound-absorbing particles from entering the interior of the single body along with the flowing of the air in the cavity of the module, the existing sound-emitting device is usually provided with a spacer to limit the sound-absorbing particles in a specific area. The mode that sets up that the isolation piece is commonly used is the mode of carriage + screen cloth combination, nevertheless because the cell-phone tends to frivolousization, module Z reduces to the space, and the ventilative area in isolation piece mesh of this kind of mode is not enough to, the carriage hardly produces the different sound chamber spaces of dysmorphism structure removal adaptation, the processing degree of difficulty increase of carriage.

SUMMERY OF THE UTILITY MODEL

The main object of the present invention is to provide a sound generating device and an electronic device using the same, which are intended to improve the acoustic performance of the sound generating device.

In order to achieve the above object, the utility model provides a sound generating device, include:

a housing having an interior cavity;

the sound generating unit is arranged in the inner cavity, the inner cavity is divided into a front sound cavity and a rear sound cavity by a vibrating diaphragm of the sound generating unit, and a sound outlet communicated with the front sound cavity is formed in the shell;

the metal isolating piece is arranged in the rear sound cavity, a sound absorbing cavity is separated from the rear sound cavity, and sound absorbing particles are filled in the sound absorbing cavity; wherein

The metal isolation piece comprises a fixed plate and a ventilation plate, the fixed plate and the ventilation plate are arranged at an included angle, the fixed plate is fixed on the inner wall of the shell, the ventilation plate isolates the sound absorbing cavity, the ventilation plate is provided with a plurality of ventilation holes, and the aperture of the ventilation holes is smaller than the particle size of the sound absorbing particles.

The utility model discloses an in the embodiment, the fixed plate hot melt is fixed in the inner wall of shell, be equipped with the hot melt post on the inner wall of shell, the fixed plate correspondence is equipped with the confession the locating hole that the hot melt post passed.

In an embodiment of the present invention, the fixing plate is fixed to the inner wall of the housing by adhesion.

In an embodiment of the present invention, an included angle between the fixing plate and the ventilation plate is 90 °.

In an embodiment of the present invention, the metal partition is made of steel, and the fixing plate and the ventilation plate are integrally formed.

The utility model discloses an in one embodiment, sound generating mechanism still includes the flexible circuit board, the flexible circuit board include with the first end that the sound production monomer electricity is connected extends the second end that shell and with the external circuit electricity is connected, and connects first end with the connecting plate of second end, the fixed plate is equipped with dodges the mouth, the connecting plate extends to extend dodge the mouth.

In an embodiment of the present invention, the housing includes a first housing and a second housing, the first housing and the second housing surround and form the inner cavity, the first housing is provided with the sound outlet, and the fixing plate is fixed to the inner wall of the first housing.

In an embodiment of the present invention, a ventilation slit is formed between the ventilation plate and the second housing, and a height of the ventilation slit is smaller than a particle size of the sound-absorbing particles.

The utility model discloses an in the embodiment, first shell is just right the region of vibrating diaphragm is equipped with the through-hole, after sound generating mechanism was fixed in electronic equipment, the vibrating diaphragm with form between electronic equipment's the shell preceding sound chamber.

In order to achieve the above objective, an embodiment of the present invention further provides an electronic device, which includes the sound generating device.

In the utility model, the metal isolation piece is arranged in the rear sound cavity of the sound production device to separate the sound absorption cavity from the rear sound cavity, and the sound absorption particles are directly filled in the sound absorption cavity; the metal isolation piece comprises a fixed plate and a breathable plate, and a certain included angle is formed between the fixed plate and the breathable plate; the fixed plate is fixed on the inner wall of the shell of the sound generating device, and the vent plate isolates the sound absorbing cavity from the rear sound cavity; the metal isolation piece of the utility model is simple and convenient to assemble, and can avoid the arrangement of a slot or a support frame and other structures to shield the air permeable plate, so that the whole air permeable plate is used for forming the air vent, thereby having higher air permeable area and further improving the acoustic performance of the loudspeaker; and the metal spacer is convenient for process out multiple shape, and the suitability is stronger.

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 embodiments or the prior art descriptions 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 an exploded view of an embodiment of the sound generating device of the present invention;

FIG. 2 is a plan view of the sound generating device of FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view of the sound emitting device of FIG. 2 taken along line A-A;

FIG. 4 is a partial block diagram of the sound generator of FIG. 1;

fig. 5 is a perspective view of the metal separator of fig. 1.

The reference numbers indicate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound production device	21	Vibrating diaphragm
10	Outer casing	30	Metal spacer
				200	Front acoustic cavity	31	Fixing plate
300	Rear acoustic cavity	311	Locating hole
				310	Sound absorbing cavity	312	Dodging port
11	First shell	32	Ventilation plate
				111	Sound outlet	40	Flexible circuit board
112	Filling hole	50	Cover plate
				113	Hot melting column	60	Damping
12	Second housing
				121	Damping hole
20	Sound monomer

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

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions of the embodiments of the present invention can be combined with each other, but it is necessary to use a person skilled in the art to realize the basis, and when the technical solutions are combined and contradictory to each other or cannot be realized, the combination of the technical solutions should not exist, and is not within the protection scope of the present invention.

The utility model provides a sound generating device aims at promoting sound generating device's acoustic performance.

It can be understood that the utility model provides a sound generating device can be applied to electronic equipment, and electronic equipment can be but is not limited to cell-phone, notebook computer, panel computer, personal Digital Assistant (PDA), electronic book reader, MP3 (moving Picture Experts Group Audio Layer III) player, MP4 (moving Picture Experts Group Audio Layer IV) player, wearable equipment, navigator, palm game machine, virtual and real equipment, augmented reality equipment etc..

The specific structure of the sound generating device provided by the present invention will be described in the following embodiments:

as shown in fig. 1 to 5, in an embodiment of the present invention, the sound generating device 100 includes a housing 10, a sound generating unit 20, and a metal spacer 30; the housing 10 has an inner cavity; the sounding single body 20 is arranged in the inner cavity, and the vibrating diaphragm 21 of the sounding single body 20 divides the inner cavity into a front sound cavity 200 and a rear sound cavity 300; the metal spacer 30 is disposed in the rear sound cavity 300, the metal spacer 30 separates the sound-absorbing cavity 310 from the rear sound cavity 300, and the sound-absorbing cavity 310 is filled with sound-absorbing particles. Specifically, the metal spacer 30 includes a fixing plate 31 and a ventilation plate 32, the fixing plate 31 and the ventilation plate 32 are arranged at an included angle, the fixing plate 31 is fixed on the inner wall of the housing 10, the ventilation plate 32 isolates the sound-absorbing cavity 310, the ventilation plate 32 is provided with a plurality of ventilation holes, and the aperture of the ventilation holes is smaller than the particle size of the sound-absorbing particles.

In this embodiment, the metal spacer 50 is disposed in the rear acoustic cavity 300, the metal spacer 50 includes a fixing plate 31 and a vent plate 32, the vent plate 32 and the fixing plate 31 are disposed at an included angle, the fixing plate 31 is fixed on the inner wall of the housing 10, and the vent plate 32 separates the sound-absorbing cavity 310 from the rear acoustic cavity 300. Because metal isolator 50 itself has certain intensity, after fixed plate 31 is fixed in the inner wall of shell 10, ventilative board 32 can be self-supporting, need not be fixed through modes such as cartridge among the prior art, perhaps combine the carriage, and then need not set up bearing structure such as slot, frame, the bleeder vent can not be sheltered from, ventilative area of ventilative board 32 and then increase, the air current circulation in the promotion back sound chamber 300 that can be better promotes sounder 100's acoustic performance.

As one embodiment, the fixing plate 31 is heat-fused to the inner wall of the housing 10. Specifically, the fixing plate 31 is fixed to the inner wall of the casing of the rear acoustic cavity 300 corresponding to the housing 10, the inner wall of the housing 10 is provided with a heat-melting column, the fixing plate 31 is provided with a positioning hole 311, and the heat-melting column is inserted into the positioning hole 31 so as to be fixed to the fixing plate 31 after heat-melting. In this embodiment, the portion of the housing 10 provided with the hot-melting column may be made of plastic material, that is, the housing 10 may be made of plastic material as a whole, or only a portion of the housing may be made of plastic material, and the hot-melting column may be disposed corresponding to the fixing plate 31. The hot melt posts can be a plurality of, and a plurality of hot melt posts are arranged at intervals, so that the fixing plate 31 is convenient to mount and reliable. In this embodiment, the fixing plate 31 may be fixed on the inner wall of the housing 10 by thermal melting, which is simple in process and saves the space occupied by the rear sound cavity 310, so that the sound generating apparatus 100 achieves better acoustic effect.

Further, the fixing plate 31 may also be fixed to the inner wall of the housing 10 by gluing, or fixed by double-sided adhesive, and the metal spacer 50 is fixed in the rear acoustic cavity 300 by fixing the fixing plate 31, which is flexible, simple and convenient in fixing manner and simple in process.

As one example, when the included angle between the fixing plate 31 and the ventilation plate 32 is 90 °, and the included angle between the fixing plate 31 and the ventilation plate 32 is 90 °, the ventilation plate 32 can be better self-supported, and the metal spacer 30 is more stably and reliably disposed.

As one example, the metal spacer 30 may be made of stainless steel, which has low cost and high hardness, and is convenient for mass production. The fixing plate 31 and the gas-permeable plate 32 are integrally formed, so that the strength and the processing efficiency of the metal spacer 50 are improved.

As shown in fig. 1, the sound generating device 100 further includes a flexible circuit board 40, and the flexible circuit board 40 electrically connects the sound generating unit 20 and an external circuit. The sound generating unit 20 is provided with a pad, a first end of the flexible circuit board 40 is electrically connected with the pad of the sound generating unit 20, and a second end of the flexible circuit board 40 extends out of the casing 10 to be electrically connected with an external circuit. It will be appreciated that the housing 10 may be provided with an avoidance slot or the like to avoid the second end. Further, the flexible circuit board 40 includes a connection plate connecting the first end and the second end, the connection plate extending through the metal spacer 50 in the rear sound chamber 300. The fixing plate 31 is provided with an avoiding opening 312 for the connection plate to penetrate out, the appearance and the size of the avoiding opening 312 are matched with the penetrating part of the connection plate, and the sound absorption particles can be effectively separated.

It can be understood that the flexible circuit board 40 is fixed to the inner wall of the casing 10 by heat fusion, and the flexible circuit board 40 and the metal spacer 30 are combined to the casing 10 by heat fusion, so as to simplify the whole assembly process of the sound generating device 100.

As a specific example, as shown in fig. 1 and 3, the housing 10 includes a first housing 11 and a second housing 12 that are covered with each other, the first housing 11 and the second housing 12 together enclose an inner cavity of the housing 10, and the sound-emitting unit 20, the metal spacer 30, the flexible circuit board 70, the sound-absorbing particles, and the like are accommodated in the inner cavity. Specifically, a supporting wall is arranged on the inner wall of the first casing 11, the sounding unit 20 is mounted on the supporting wall and forms a front sound cavity with the first casing 11, and the first casing 11 is provided with a sound outlet 111 communicated with the front sound cavity; the first housing 11, the second housing 12 and the sounding unit 20 enclose to form a rear sound cavity 300, and the fixing plate 31 is fixed to the inner wall of the first housing 11.

It should be noted that, in the practical application process, the first housing 11 and the second housing 12 may be plastic members at the same time, and are combined together by ultrasonic welding; one metal piece and the other plastic piece can be combined together in an adhesive connection mode.

The fixing plate 31 is fixed on the inner wall of the first housing 11, the air permeable plate 32 is vertically arranged between the first housing 11 and the second housing 12, and one end of the air permeable plate 32, which is far away from the fixing plate, can abut against the inner wall of the second housing 12 and can form an air permeable slit with the inner wall of the second housing 12. The height of the air-permeable slits is smaller than the particle size of the sound-absorbing particles to block the sound-absorbing particles from entering the sound-emitting unit 20.

It is understood that the metal spacer 30 may have different shapes according to different shapes of the inner cavity space. The metal spacer 30 may be provided with a plurality of bending portions, and the metal spacer 30 is bent and extended in the rear sound cavity 300 to maximize the volume of the sound-absorbing cavity 310, so as to fill more sound-absorbing particles. The metal spacer 30 may also have a structure such as a relief step 33, a support boss extending from the housing 10 into the cavity, and the like.

As one embodiment, a through hole is formed in a region of the first housing 11 facing the diaphragm 21, and after the sound generating apparatus 100 is fixed to the electronic device, a front acoustic cavity 200 is formed between the diaphragm 21 and the housing of the electronic device. The front sound cavity 200 is formed by matching the shell of the electronic device with the sound generating device 100, and the thickness of 1 shell can be reduced in the thickness direction of the sound generating device 200, so that the thinning development of the sound generating device 100 is facilitated.

As an embodiment, the area of the second casing 12 facing the sound-generating unit 20 is also provided with a through hole, and the sound-generating unit 20 is disposed facing the through hole and blocks the through hole. The second housing 12 is provided with a through hole, and the sound generating device 100 is exposed out of the through hole, so that the thickness of the sound generating device 100 is further reduced, and the sound generating device 100 tends to be thinned.

In addition, it is understood that the casing 10 is further provided with a filling hole 112, and the filling can be maximized by filling the sound-absorbing particles through the filling hole 112, in this embodiment, the filling hole 112 is provided on the first housing 11. A cover plate 50 is further included to cover the filling aperture 112, and the cover plate 50 is detachably connected to the first housing 11. The cover plate 50 may be a PET plate, or may be made of other materials and shapes, and is disposed on the first housing 11 by gluing, inserting, or the like to achieve the effect of sealing the filling hole 112.

As shown in fig. 1, the first casing 11 is provided with a damping hole 121 at a position corresponding to the rear sound chamber 300, and the first casing 11 is provided with a damper 60 at a position corresponding to the damping hole 121. In this way, the exchange of the air flows inside and outside the sound generating device 100 can be performed efficiently, the sound pressure inside the sound generating device 100 can be made more uniform, and the sound quality of the sound generating device 100 can be improved.

As can be appreciated, the existing mesh assembly generally comprises two parts, i.e. a support member and a mesh, and the mesh needs to be supported by the support member to be installed and fixed in the rear acoustic cavity 300; however, the supporting member is generally a narrow ring-shaped structure, and on the premise of ensuring the stability of the mesh cloth fixed to the supporting member and the convenience of the mesh cloth assembled in the supporting member and the supporting member fixed in the rear sound cavity 300, the supporting member is difficult to adopt a special-shaped structure, so that the space of the rear sound cavity 300 of the sound generating device 100 cannot be well adapted.

In the technical solution of this embodiment, the metal spacer 30 with air-permeable isolation function adopts a fixing plate 31 and an air-permeable plate 32, the fixing plate 31 is fixed on the inner wall of the casing 10, and the air-permeable plate 32 is used to isolate the sound-absorbing particles. The metal spacer 30 thus manufactured is suitable for different sound generating device 100 structures, has a wider application range, and greatly saves assembly processes.

The utility model also provides an electronic equipment, this electronic equipment include as before sound generating mechanism, this sound generating mechanism's concrete structure refers to aforementioned embodiment. Since the electronic device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by all the technical solutions of all the embodiments are achieved, and no further description is given here.

It is understood that the electronic device may be, but is not limited to, a mobile phone, a notebook, a tablet, a Personal Digital Assistant (PDA), an e-book reader, an MP3 (motion Picture Experts compressed standard Audio Layer 3, moving Picture Experts Group Audio Layer III) player, an MP4 (motion Picture Experts compressed standard Audio Layer 4, moving Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a handheld game console, a virtual and real device, an augmented reality device, etc.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A sound generating device, comprising:

a housing having an interior cavity;

2. The sounding device as claimed in claim 1, wherein the fixing plate is fixed to the inner wall of the housing by thermal fusing, the inner wall of the housing is provided with a thermal fusing column, and the fixing plate is correspondingly provided with a positioning hole for the thermal fusing column to pass through.

3. The sound generating apparatus of claim 1 wherein said mounting plate is adhesively secured to the inner wall of said housing.

4. The sound generating apparatus of claim 1, wherein the angle between the stationary plate and the gas permeable plate is 90 °.

5. The sound generating apparatus as claimed in claim 1, wherein said metal spacer is made of steel, and said fixing plate and said gas permeable plate are integrally formed.

6. The sound generating apparatus of claim 1, further comprising a flexible circuit board including a first end electrically connected to the sound generating unit, a second end extending out of the housing and electrically connected to an external circuit, and a connecting plate connecting the first end and the second end, the fixing plate being provided with an escape opening through which the connecting plate extends.

7. The apparatus according to claim 1, wherein said housing comprises a first housing and a second housing, said first housing and said second housing enclosing said cavity, said first housing having said sound outlet, said fixing plate being fixed to an inner wall of said first housing.

8. The sound-generating apparatus according to claim 7, wherein a ventilation slit having a width smaller than a particle diameter of the sound-absorbing particles is formed between the ventilation plate and the second casing.

9. The sound-generating apparatus of claim 7, wherein a through hole is formed in a region of the first housing facing the diaphragm, and after the sound-generating apparatus is fixed to an electronic device, the diaphragm and the housing of the electronic device form the front sound cavity therebetween.

10. An electronic device characterized by comprising the sound emitting apparatus according to any one of claims 1 to 9.