CN109218937B

CN109218937B - Sound production device

Info

Publication number: CN109218937B
Application number: CN201810910345.9A
Authority: CN
Inventors: 顾小江
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2021-06-15
Anticipated expiration: 2038-08-10
Also published as: CN109218937A

Abstract

The invention provides a sounding device which comprises a basin frame, a vibration system fixed on the basin frame and a front cover covering the basin frame and forming a front cavity with the vibration system, wherein the vibration system comprises a vibration diaphragm fixed on the basin frame and a ball top attached to the vibration diaphragm, the front cover is provided with a sounding hole communicated with the front cavity, the front cover is provided with a containing groove formed by sinking towards the direction close to the vibration system, a sounding hole is arranged in the containing groove, the sounding hole is arranged at the bottom of the containing groove and penetrates through the containing groove, the sounding device is further provided with a breathable isolating piece arranged in the containing groove, and the breathable isolating piece is covered with the sounding hole. Compared with the prior art, the sound production device has high space utilization rate in the height direction and excellent acoustic performance.

Description

Sound production device

Technical Field

The invention relates to the field of electroacoustic conversion, in particular to a sounding device applied to a portable electronic product.

Background

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.

The sound production device in the related art comprises a basin frame, a vibration system fixed on the basin frame and a front cover which is covered on the basin frame and forms a front cavity with the vibration system, wherein the front cover comprises a body part covered on the basin frame and a sound outlet which penetrates through the body part and is communicated with the front cavity; the sounding device further comprises a steel sheet fixed on the front cover and completely covering the sounding hole, and a breathable isolating piece attached and fixed on the steel sheet.

However, in the sound-generating device in the related art, the upper surface of the steel sheet is a complete plane, and the breathable separator is attached and fixed on the flat surface of the steel sheet, so that the breathable separator protrudes out of the steel sheet, the height of the product is additionally occupied, and the height-space utilization rate of the single body is reduced.

Therefore, it is necessary to provide a new sound generation device to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a sound production device capable of improving the space utilization rate of a single body.

In order to achieve the above object, the present invention provides a sound-generating device, including a frame, a vibration system fixed on the frame, and a front cover covering the frame and forming a front cavity with the vibration system, wherein the vibration system includes a vibration diaphragm fixed on the frame and a dome attached to the vibration diaphragm, the front cover is provided with a sound outlet communicated with the front cavity, the front cover is provided with a containing groove formed by sinking towards a direction close to the vibration system, the containing groove is provided with a sound outlet hole, the sound outlet hole is arranged at the bottom of the containing groove and penetrates through the containing groove, the sound-generating device is further provided with a breathable isolation member arranged in the containing groove, and the breathable isolation member covers the sound outlet hole.

Preferably, the ball top is provided with a yielding hole penetrating through the ball top, the yielding hole is right opposite to the accommodating groove, and the accommodating groove is located in the yielding hole in the orthographic projection direction of the ball top.

Preferably, the ball top is provided with a recess groove formed by depression, the recess groove is right opposite to the accommodating groove, and the accommodating groove is located in the recess groove in the orthographic projection of the ball top.

Preferably, the front cover comprises a body part covered on the basin frame and a steel sheet embedded and fixed on the body part, and the sound outlet hole is formed in the steel sheet.

Preferably, the plane of one side of the breathable isolating piece, which is far away from the top of the ball, is flush with the plane of one side of the steel sheet, which is far away from the top of the ball.

Preferably, the accommodating groove is a rectangular groove.

Preferably, the sound outlet hole comprises two rectangular holes which are arranged at intervals.

Compared with the prior art, the steel sheet in the sound production device is provided with the accommodating groove, and the sound production hole penetrates through the accommodating groove and is communicated with the front cavity. The breathable isolating piece is arranged in the accommodating groove and completely covers the sound outlet hole. The ball top corresponding to the lower part of the containing groove is hollowed or thinned, so that a yielding structure is formed, a vibration system has enough vibration space, and the acoustic performance of the sound production device is guaranteed. The breathable partition piece is arranged in the accommodating groove of the steel sheet, so that the breathable partition piece is prevented from additionally occupying the height of a product, the total height size is reduced, and the height space utilization rate of the single body is improved.

FIG. 1 is a schematic perspective view of a sound device according to the present invention;

FIG. 2 is a partially exploded perspective view of a sound device according to the present invention;

fig. 3 is a cross-sectional view taken along the plane a-a in fig. 1.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a sound generating device 100, which includes a frame 1, a vibration system 2, a magnetic circuit system 3, a scalding post 4 and a front cover 5.

In the present embodiment, the frame 1 is described by taking a rectangular shape as an example, but it is needless to say that the frame may have a circular shape or another shape, and the frame is not limited thereto.

The vibration system 2 and the magnetic circuit system 3 are respectively fixed on the basin frame 1, and the magnetic circuit system 3 is used for driving the vibration system 2 to vibrate and sound. The basin frame 1, the vibration system 2 and the magnetic circuit system 3 jointly enclose a back cavity (not labeled) for improving the low-frequency acoustic performance of the sound production device 100.

The hot spot column 4 is formed by extending the basin frame 1 towards the front cover 5 and is used for fixing the front cover 5 on the basin frame 1.

In the embodiment, the front cover 5 is covered on the basin frame 1, and the front cover 5 and the vibration system 2 jointly enclose a front cavity 10 for sound production.

Specifically, the front cover 5 includes a body portion 51 and a sound outlet 52.

The body part 51 is covered on the frame 1.

A sound outlet hole 52 is provided through the body portion 51 and communicates with the front chamber for sound production.

In order to change the high-frequency acoustic performance of the sound-generating device 100, the sound-generating device 100 further comprises a steel sheet 6 fixed on the front cover 5 and completely covering the sound-generating hole 52, and a breathable isolating piece 7 attached to the steel sheet 6, wherein the steel sheet 6 is provided with a containing groove 61 formed by sinking in the direction close to the vibration system 2, the sound-generating hole 62 is arranged in the containing groove 61, the sound-generating hole 62 penetrates through the containing groove 61, and the breathable isolating piece 7 is arranged in the containing groove 61 and completely covers the sound-generating hole 62.

Namely, the ventilating spacer 7 is fixed on the side of the steel sheet 6 far away from the vibration system 2, and the ventilating spacer 7 does not occupy the space of the front cavity in the arrangement, so that the vibration system 2 has enough vibration space.

The breathable partition 7 is used for improving high-frequency performance and ventilation and isolation, namely air can circulate, foreign matters can be prevented from entering to influence sounding, and reliability is improved.

In this embodiment, the young's modulus of the steel sheet 6 is greater than that of the front cover 5, so that the high-frequency acoustic performance of the front cavity can be increased, and the ventilation spacer 7 can effectively avoid high-frequency distortion, so that the acoustic performance of the sound generating device 100 is better.

In the present embodiment, the accommodating groove 61 is a rectangular groove. The sound outlet hole 62 includes two rectangular holes spaced apart from each other. The structure corresponds to the structure of the rectangular basin frame 1, but of course, the structure can also be round or other shapes, and is not limited to the structure.

The vibration system 2 comprises a vibrating diaphragm 21 fixed on the basin stand 1 and a ball top 22 attached to the vibrating diaphragm 21, and two structures of the ball top 22 are provided in the embodiment.

One is as follows: the top dome 22 is provided with a yielding hole 221 penetrating through the top dome 22, the yielding hole 221 is arranged opposite to the accommodating groove 61, and the orthographic projection of the accommodating groove 61 to the top dome 22 direction is located in the yielding hole 221. That is, the structure is to hollow the position of the dome 22 corresponding to the position of the protrusion below the receiving groove 61 to form the receding hole 221, so as to avoid the position of the protrusion below the receiving groove 61, and thus the vibration system 2 has a sufficient vibration space.

The other is as follows: the top dome 22 is provided with a yielding groove which is formed by sinking towards the direction away from the steel sheet 6, the yielding groove is arranged opposite to the containing groove 61, and the orthographic projection of the containing groove 61 towards the top dome 22 is positioned in the yielding groove. The lower surfaces of the domes 22 remote from the steel sheet 6 lie in the same plane. That is, the structure is to thin the dome 22 corresponding to the position of the protrusion below the receiving groove 61 to form a receding groove, so as to avoid the position of the protrusion below the receiving groove 61, and thus the vibration system 2 has a sufficient vibration space.

Preferably, in both structures, the plane of the side of the breathable isolating piece 7 far away from the spherical top 22 is flush with the plane of the side of the steel sheet 6 far away from the spherical top 22. This structure can ensure that the space in the height direction is utilized as much as possible.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A sounding device comprises a basin frame, a vibration system fixed on the basin frame, and a front cover which is covered on the basin frame and forms a front cavity with the vibration system, wherein the vibration system comprises a vibration diaphragm fixed on the basin frame and a ball top attached on the vibration diaphragm, and the front cover is provided with a sounding hole communicated with the front cavity; the ball top is provided with a yielding hole penetrating through the ball top, the yielding hole is right opposite to the containing groove, the containing groove is located in the yielding hole in the direction of the ball top in an orthographic projection mode, or the ball top is provided with a yielding groove formed in a concave mode, the yielding groove is right opposite to the containing groove, and the containing groove is located in the yielding groove in the orthographic projection mode in the direction of the ball top.

2. The sound production device as claimed in claim 1, wherein the front cover comprises a body portion covering the frame and a steel sheet embedded and fixed on the body portion, and the sound outlet is disposed on the steel sheet.

3. The sounder device according to claim 2, wherein a plane of a side of the gas permeable spacer remote from the dome is flush with a plane of a side of the steel sheet remote from the dome.

4. The sounder device according to claim 2, wherein the receiving slot is a rectangular slot.

5. The sound emitting device of claim 4, wherein the sound emitting aperture comprises two rectangular apertures spaced apart from each other.