CN211019207U

CN211019207U - Sound production device

Info

Publication number: CN211019207U
Application number: CN201922151212.0U
Authority: CN
Inventors: 信星星; 肖波
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-07-14
Anticipated expiration: 2029-12-04
Also published as: WO2021109189A1

Abstract

The utility model discloses a sounding device, which comprises a basin frame, a vibration system and a magnetic circuit system; the vibration system comprises a vibrating diaphragm and a voice coil; the voice coil is of a rectangular structure and comprises a first section, a second section and a corner, wherein the first section and the second section are oppositely arranged, and the corner is used for connecting the adjacent first section and the second section; the magnetic circuit system comprises a magnetic bowl and magnetic steel, wherein the magnetic bowl comprises a main body part, an extension part, an outward flanging, an inward flanging and a leakage hole; the outward flanging comprises a first outward flanging and a second outward flanging; the inner flanging comprises a first inner flanging and a second inner flanging; the first outward flanging and the first inward flanging are opposite to the first section and are arranged at intervals, and the second outward flanging and the second inward flanging are opposite to the second section and are arranged at intervals; the leakage hole comprises a first leakage hole and a second leakage hole, the first leakage hole is arranged between the first outward flanging and the first inward flanging, and the second leakage hole is arranged between the second outward flanging and the second inward flanging. Compared with the prior art, the utility model discloses a sounding device simple structure, it is with low costs, acoustic performance is more excellent.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an acoustoelectric field especially relates to a sounding device.

[ background of the invention ]

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 and a magnetic circuit system, wherein the vibration system is respectively supported and fixed on the basin frame, the magnetic circuit system drives the vibration system to vibrate, and the magnetic circuit system comprises a magnetic bowl fixed on the basin frame and magnetic steel contained in the magnetic bowl.

However, in the sound-producing device of the related art, the leakage hole is opened at the round corner between the two adjacent side walls of the magnetic bowl, so that the size of the leakage hole is small, and the B L of the magnetic circuit structure is small, so that it is difficult to obtain a sound-producing device with large leakage and high Q value, which directly affects the acoustic performance of the sound-producing device.

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

[ Utility model ] content

An object of the utility model is to provide a sound production device that simple structure, low cost and acoustic performance are good.

In order to achieve the above object, the present invention provides a sound-producing device, which comprises a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound; the vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil for driving the vibrating diaphragm to vibrate; the voice coil is of a rectangular structure and comprises a first section, a second section and a corner, wherein the first section and the second section are oppositely arranged, and the corner is connected with the adjacent first section and the second section; magnetic circuit is including being fixed in the magnetism bowl of basin frame, accept in the magnet steel in the magnetism bowl, its characterized in that, the magnetism bowl includes: the vibrating diaphragm is characterized by comprising a main body part for fixing the magnetic steel, an extension part extending from the main body part to the direction far away from the magnetic steel, an outer flanging formed by bending and extending the peripheral edge of the extension part far away from the magnetic steel to the direction close to the vibrating diaphragm, an inner flanging formed by bending and extending the peripheral edge of the main body part to the direction close to the vibrating diaphragm and a leakage hole penetrating through the extension part;

the outward flanging comprises a first outward flanging and a second outward flanging, the first outward flanging is opposite to the first section and is arranged at an interval, and the second outward flanging is opposite to the second section and is arranged at an interval;

the inner flanging comprises a first inner flanging and a second inner flanging, the first inner flanging is opposite to the first section and is arranged at an interval, and the second inner flanging is opposite to the second section and is arranged at an interval;

the leakage hole comprises a first leakage hole and a second leakage hole, the first leakage hole is arranged between the first flanging and the first inner flanging, and the second leakage hole is arranged between the second flanging and the second inner flanging.

Preferably, the first outward turning edge and the first inward turning edge are arranged opposite to each other at intervals, and the second outward turning edge and the second inward turning edge are arranged opposite to each other at intervals.

Preferably, the voice coil is inserted between the inner flange and the magnetic steel.

Preferably, the magnetic bowl further comprises a yielding groove, wherein the main body part is close to one side of the vibrating diaphragm and is far away from the side of the vibrating diaphragm, and the vibrating diaphragm is sunken in the direction, and the yielding groove is located between the magnetic steels.

Preferably, the vibration system further comprises an auxiliary diaphragm fixed on one side of the voice coil, which is far away from the diaphragm, the auxiliary diaphragm is provided with an opening, and the inner flange extends towards the diaphragm through the opening.

Preferably, the auxiliary diaphragm comprises a first fixing portion fixed on the frame, a second fixing portion fixed on the voice coil, and a connecting portion connecting the first fixing portion and the second fixing portion, and the opening is communicated with the connecting portion.

Preferably, the auxiliary vibrating diaphragms comprise two auxiliary vibrating diaphragms which are symmetrically arranged on one side of the magnetic steel deviated from the first section respectively, and the second fixing part is fixed on one side of the vibrating diaphragm deviated from the first section.

Preferably, the vibration system further includes an elastic member fixed to a side of the auxiliary diaphragm away from the diaphragm, where the elastic member includes a first fixing arm fixed to the first fixing portion, a second fixing arm fixed to the second fixing portion, and two elastic arms connected to the first fixing arm and the second fixing arm; the first fixing portion and the first fixing arm are clamped between the first outer flanging and the basin frame, and the first inner flanging is arranged between the two elastic arms and extends towards the vibrating diaphragm through the opening.

Preferably, the magnetic circuit system further comprises a pole core stacked on the magnetic steel and an annular upper clamping plate embedded on the basin stand.

Compared with the prior art, the utility model discloses an in the sounder, the magnetic bowl is including running through the hole that leaks that the extension set up leaks, leaks the hole and sets up respectively between flanging and the inside turn-ups, with the inside and external intercommunication of sounder, realized the inside and external acoustic pressure balance of sounder, make the acoustical performance of sounder is more excellent on the other hand, replaces the limit magnet steel among the current magnetic structure through the inside turn-ups, has improved magnetic circuit's performance, has guaranteed that sounder has enough big B L, has reduced manufacturing cost.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and 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 without inventive work, wherein:

fig. 1 is a schematic perspective view of the sound device of the present invention;

FIG. 2 is an exploded view of the sound device according to the present invention;

FIG. 3 is an exploded view of a part of the three-dimensional structure of the sound device of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 5 is a schematic view of a three-dimensional structure of the magnetic bowl of the sound generating device of the present invention.

[ detailed description ] embodiments

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.

Referring to fig. 1-5, the present invention provides a sound generating device 10, which includes a frame 1, a vibration system 2 and a magnetic circuit system 3. The vibration system 2 and the magnetic circuit system 3 are respectively supported on the basin frame 1, and the magnetic circuit system 3 drives the vibration system 2 to vibrate and sound.

The vibration system 2 comprises a diaphragm 21 fixed on the frame 1 and a voice coil 22 for driving the diaphragm 21 to vibrate.

The voice coil 22 has a rectangular structure, and the voice coil 22 includes a first section 221 disposed opposite to each other, a second section 222 disposed opposite to each other, and a corner 223 connecting the first section 221 and the second section 222 adjacent to each other.

The magnetic circuit system 3 comprises a magnetic bowl 31 fixed on the frame 1 and magnetic steel 32 contained in the magnetic bowl 31.

Specifically, the magnetic bowl 31 includes: the main body 311 is used for fixing the magnetic steel 32, the extension 312 extends from the main body 311 in a direction away from the magnetic steel 32, the outer flange 313 is formed by bending and extending the periphery of the extension 312 away from the magnetic steel 32 in a direction close to the diaphragm 21, the inner flange 314 is formed by bending and extending the periphery of the main body 311 in a direction close to the diaphragm, and the leakage hole 315 is formed through the extension 312.

Further, the flanging 313 includes a first flanging 3131 and a second flanging 3132, the first flanging 3131 and the first section 221 are opposite to and spaced from each other, and the second flanging 3132 and the second section 222 are opposite to and spaced from each other; the inner flange 314 comprises a first inner flange 3141 and a second inner flange 3142, the first inner flange 3141 and the first section 221 are arranged opposite to each other at intervals, and the second inner flange 3142 and the second section 222 are arranged opposite to each other at intervals.

In this embodiment, the first outward turning edge 3131 and the first inward turning edge 3141 are oppositely arranged at an interval, and the second outward turning edge 3132 and the second inward turning edge 3142 are oppositely arranged at an interval.

Further, the leakage hole 315 includes a first leakage hole 3151 and a second leakage hole 3152, the first leakage hole 3151 is disposed between the first outward flange 3131 and the first inward flange 3141, and the second leakage hole 3152 is disposed between the second outward flange 3132 and the second inward flange 3142.

In the above structure, the magnetic bowl 31 includes the leakage hole 315 penetrating the extension part 312, and the leakage hole 315 is respectively disposed between the outward flange 313 and the inward flange 314 to communicate the interior of the sound generating device with the outside, so as to realize the sound pressure balance between the interior of the sound generating device and the outside, and make the low-frequency acoustic performance of the sound generating device 10 better.

In this embodiment, the magnetic bowl 31 further includes by the main part 311 is close to one side of the vibrating diaphragm 21 is kept away from the sunken groove of stepping down 316 of vibrating diaphragm 21 direction, the groove of stepping down 316 is located the turn-up 314 with between the magnet steel 32, the voice coil 22 is inserted and is located the turn-up 314 with between the magnet steel 32, thereby guaranteed that the voice coil 22 has enough big vibration space, improved the amplitude, made the acoustic effect of the sound production device 10 is better.

In the present embodiment, the magnetic circuit system 3 further includes a pole core 33 stacked on the magnetic steel 32, and an annular upper clamp plate 34 embedded in the frame 1.

The vibration system 2 further includes an auxiliary diaphragm 23 fixed to a side of the voice coil 22 away from the diaphragm 21.

Specifically, the auxiliary diaphragm 23 includes a first fixing portion 231 fixed to the frame 1, a second fixing portion 232 fixed to the voice coil 22, and a connecting portion 233 connecting the first fixing portion 231 with the second fixing portion 232, the auxiliary diaphragm 23 is provided with an opening 234, the opening 234 penetrates through the connecting portion 233, and the inner flange 314 passes through the opening 234 to the diaphragm 21 extends.

In this embodiment, the auxiliary diaphragms 23 include two, which are symmetrically disposed on the side of the first section 221 away from the magnetic steel 32, and the second fixing portion 232 is fixed on the side of the first section 221 away from the diaphragm 21, so as to balance the swing of the vibration system 2 and improve the stability of the sound generating device 10.

Further, the vibration system 2 further includes an elastic member 24 fixed on a side of the auxiliary diaphragm 23 away from the diaphragm 21, where the elastic member 24 includes a first fixing arm 241 fixed on the first fixing portion 231, a second fixing arm 242 fixed on the second fixing portion 232, and two elastic arms 243 connecting the first fixing arm 241 and the second fixing arm 242.

In this embodiment, the first fixing portion 231 and the first fixing arm 241 are sandwiched between the first flanging 3131 and the frame 1, and the first inward flanging 3141 is disposed between the two elastic arms 243 and extends toward the diaphragm 21 through the opening 234.

Compared with the prior art, the utility model discloses an in the sounder, the magnetic bowl is including lining up the hole that leaks that the extension set up reveals, reveals the hole and sets up respectively between flanging and the inside turn-ups, with the inside and external intercommunication of sounder, realized the inside and external acoustic pressure balance of sounder, make the acoustical performance of sounder is more excellent on the other hand, replaces the limit magnet steel among the current magnetic structure through the inside turn-ups, has improved magnetic circuit's performance, has guaranteed that sounder has enough big B L, has reduced manufacturing cost.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A sounding device comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system for driving the vibration system to vibrate and sound; the vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil for driving the vibrating diaphragm to vibrate; the voice coil is of a rectangular structure and comprises a first section, a second section and a corner, wherein the first section and the second section are oppositely arranged, and the corner is connected with the adjacent first section and the second section; magnetic circuit is including being fixed in the magnetism bowl of basin frame, accept in the magnet steel in the magnetism bowl, its characterized in that, the magnetism bowl includes: the vibrating diaphragm is characterized by comprising a main body part for fixing the magnetic steel, an extension part extending from the main body part to the direction far away from the magnetic steel, an outer flanging formed by bending and extending the peripheral edge of the extension part far away from the magnetic steel to the direction close to the vibrating diaphragm, an inner flanging formed by bending and extending the peripheral edge of the main body part to the direction close to the vibrating diaphragm and a leakage hole penetrating through the extension part;

2. The sounder device according to claim 1, wherein the first outward flange is spaced from and in facing relation to the first inward flange, and the second outward flange is spaced from and in facing relation to the second inward flange.

3. The sounder device according to claim 1, wherein the voice coil is interposed between the inner flange and the magnetic steel.

4. The sounding device according to claim 1, wherein the magnetic bowl further comprises a recess recessed from a side of the main body portion close to the diaphragm in a direction away from the diaphragm, and the recess is located between the inner flange and the magnetic steel.

5. The sounding device according to claim 1, wherein the vibration system further comprises an auxiliary diaphragm fixed to a side of the voice coil remote from the diaphragm, the auxiliary diaphragm having an opening, and the inner flange extending toward the diaphragm through the opening.

6. The sounding device according to claim 5, wherein the auxiliary diaphragm comprises a first fixing portion fixed to the frame, a second fixing portion fixed to the voice coil, and a connecting portion connecting the first fixing portion and the second fixing portion, and the opening is disposed through the connecting portion.

7. The sounding device according to claim 6, wherein the auxiliary diaphragm comprises two auxiliary diaphragms, the two auxiliary diaphragms are symmetrically disposed on the side of the first section away from the magnetic steel, and the second fixing portion is fixed on the side of the first section away from the diaphragm.

8. The sounding device according to claim 7, wherein the vibration system further comprises an elastic member fixed to a side of the auxiliary diaphragm away from the diaphragm, the elastic member comprising a first fixing arm fixed to the first fixing portion, a second fixing arm fixed to the second fixing portion, and two elastic arms connecting the first fixing arm and the second fixing arm; the first fixing portion and the first fixing arm are clamped between the first outer flanging and the basin frame, and the first inner flanging is arranged between the two elastic arms and extends towards the vibrating diaphragm through the opening.

9. The sounding device as claimed in claim 8, wherein the magnetic circuit system further comprises a pole core stacked on the magnetic steel and a ring-shaped upper clamping plate embedded in the basin frame.