CN212812017U

CN212812017U - Sound production device

Info

Publication number: CN212812017U
Application number: CN202021310023.XU
Authority: CN
Inventors: 肖波; 孔晨亮; 章统; 令狐荣林
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-26
Anticipated expiration: 2030-07-06
Also published as: WO2022007167A1

Abstract

The utility model provides a sounding device, it includes the basin frame, is fixed in respectively the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system is including being fixed in the vibrating diaphragm of basin frame, sounding device is still located including the lid the upper cover of vibrating diaphragm, the basin frame the vibrating diaphragm and the upper cover is injection moulding as an organic whole. Compared with the prior art, the utility model discloses a sounding device's sealed effectual, assembly efficiency is high, and 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 internet era, the number of mobile terminal devices has increased. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. Sound production devices for playing sounds such as music are widely used in mobile terminal devices such as mobile phones, and a vibration system in the sound production devices is particularly important, and the whole sound production device produces sound through vibration of the vibration system.

The sound production device in the related art comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system which drives the vibration system to vibrate and is provided with a magnetic gap; the vibration system comprises a diaphragm for vibrating and sounding.

However, in the related art, the sealing performance of the sound generating device is poor, the assembly efficiency is low, and when the basin frame and the vibrating diaphragm are glued and fixed, glue easily flows into the magnetic gap, so that the production efficiency and the acoustic performance of the sound generating device are greatly reduced.

Therefore, there is a need to provide a new sound generation device to solve the above problems.

[ Utility model ] content

An object of the utility model is to provide a sound production device that sound production effect is better.

In order to achieve the above object, the present invention provides a sound-producing device, which comprises a basin frame, a vibration system respectively fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the magnetic circuit system has a magnetic gap, the vibration system comprises a vibration diaphragm fixed on the basin frame, the sound-producing device further comprises an upper cover covering the vibration diaphragm, and the basin frame, the vibration diaphragm and the upper cover are integrally injection molded; the vibrating diaphragm comprises two sub vibrating diaphragms which are arranged on two opposite sides of the magnetic circuit system at intervals respectively and a connecting part which is connected with the two sub vibrating diaphragms and fixed on the basin frame, and the upper cover is positioned between the two sub vibrating diaphragms; each sub-diaphragm comprises a vibrating part, a corrugated rim part bent and extended from the periphery of the vibrating part and a fixing part bent and extended from one side of the corrugated rim part far away from the vibrating part; the fixing part comprises a first fixing part which is positioned on one side of the vibrating part far away from the upper cover and is fixed on the basin frame, a second fixing part which is arranged opposite to the first fixing part at an interval and is fixed on the magnetic circuit system, and a third fixing part which is connected with the first fixing part and the second fixing part and is fixed on the basin frame;

the upper cover comprises a cover plate arranged at intervals with the second fixing part and a surrounding wall bent and extended from the periphery of the cover plate to the magnetic circuit system, and the surrounding wall is fixedly connected with the second fixing part and the connecting part at the same time.

Preferably, the basin stand is a steel ring.

Preferably, the vibration system further includes a voice coil inserted into the magnetic gap to drive the sub-diaphragm to vibrate, a framework suspending the voice coil in the magnetic gap, and an avoidance space formed by a side of the sub-diaphragm close to the magnetic circuit and recessed towards a direction far away from the magnetic circuit;

the framework comprises a framework body and a first framework connecting arm, the framework body is respectively fixed on one side, close to the magnetic circuit system, of the two sub-diaphragms, the first framework connecting arm is formed by extending the framework body to the voice coil direction, and the first framework connecting arm extends into the magnetic gap and is connected with the voice coil;

the avoiding space is opposite to the first framework connecting arm and used for providing a vibration space for the first framework connecting arm.

Preferably, the magnetic circuit system comprises a magnetic yoke fixed on one side of the basin frame far away from the vibrating diaphragm, a main magnetic steel assembly fixedly arranged on the magnetic yoke, and an auxiliary magnetic steel assembly forming the magnetic gap with the main magnetic steel assembly at an interval, and the second fixing part is fixed on the auxiliary magnetic steel assembly.

Preferably, the voice coil is of a rectangular structure with round corners, each framework body extends to form two first framework connecting arms, the two first framework connecting arms are connected to two adjacent round corners at two ends of a long shaft of the voice coil respectively, and the avoidance spaces are arranged at two opposite ends of the second fixing portion.

Preferably, the skeleton is still including connecting two the skeleton body just is two second skeleton linking arms of relative setting.

Preferably, the two second framework connecting arms are respectively located on the outer sides of the two short shafts of the voice coil, and the first framework connecting arms are connected to the adjacent second framework connecting arms.

Preferably, the second fixing portion includes a first section fixed to the auxiliary magnetic steel assembly, a second section extending from an end of the first section close to the first skeleton connecting arm to a direction away from the magnetic circuit system in a bending manner, a third section extending from an end of the second section far from the first section in a bending manner and arranged at an interval with the first skeleton connecting arm, a fourth section extending from an end of the third section far from the second section to a direction close to the third fixing portion and connected with the third fixing portion, and a fifth section extending from one side of the first section far from the auxiliary magnetic steel assembly to a direction of the upper cover in a protruding manner, and the avoiding space is formed by the second section, the third section and the fourth section in a surrounding manner; and one ends of the third section and the fourth section, which are far away from the second section, are fixed on the basin stand.

Preferably, the vibration system further comprises an elastic conductive piece fixed on one side of the basin frame far away from the vibrating diaphragm, and the elastic conductive piece comprises an elastic conductive piece main body and a first extension arm and a second extension arm which are formed by respectively extending two opposite sides of the elastic conductive piece main body; the first extension arm is fixed in the basin frame, the second extension arm is fixed in the skeleton body is kept away from the one end of vibration portion, the second extension arm be equipped with the pad that the voice coil loudspeaker voice coil electricity is connected.

Preferably, the vibration system further comprises an auxiliary diaphragm attached to one side of the elastic conductive piece, which is far away from the diaphragm.

Compared with the prior art, the utility model discloses a sounder includes the basin frame, is fixed in respectively the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system is including being fixed in the vibrating diaphragm of basin frame, sounder still locates including the lid the upper cover of vibrating diaphragm, the basin frame the vibrating diaphragm and the upper cover is injection moulding as an organic whole. The structure is arranged, so that the assembly process among the basin frame, the vibrating diaphragm and the upper cover is omitted, the sealing performance is guaranteed, and the production efficiency and the waterproof grade of the sounding device are improved. On the other hand, because the basin frame, the vibrating diaphragm and it is fixed to need not glue through beating between the upper cover three, basin frame and upper cover do not have the restriction of veneer limit width, can do the wall thickness of basin frame and upper cover thin, and then can increase the vibration area of vibrating diaphragm, help improving the wholeness ability of sound production device, and the setting of this structure does not have the puzzlement that glue got into the magnetic gap, has improved the pure tone yield of sound production device.

[ 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 view of the three-dimensional structure 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 a cross-sectional view of the sound production device of the present invention;

fig. 4 is a schematic structural diagram of the sub-diaphragm 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. 1-4, the present invention provides a sound-generating device 100, the sound-generating device 100 includes a basin frame 1, a vibration system 2 fixed to the basin frame 1, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate and generate sound, wherein the magnetic circuit system 3 has a magnetic gap 30.

In the present embodiment, the frame 1 is a steel ring.

The vibration system 2 comprises a diaphragm 21 fixed to the frame 1.

In this embodiment, the sound generating device 100 further includes an upper cover 4 covering the vibrating diaphragm 21, and the basin frame 1, the vibrating diaphragm 21 and the upper cover 4 are integrally formed by injection molding. The structure of the sound-producing device 100 saves the assembly process among the basin frame 1, the vibrating diaphragm 21 and the upper cover 4, and ensures the sealing performance, thereby improving the production efficiency and the waterproof grade of the sound-producing device 100. On the other hand, because the basin frame 1, vibrating diaphragm 21 and it is fixed that do not need to glue between the 4 three of upper cover, basin frame 1 and upper cover 4 do not have the restriction of gluing limit width, can do the wall thickness of basin frame 1 and upper cover 4 thin, and then can increase vibrating diaphragm 21's vibration area, help improving the wholeness ability of sound production device, and the setting of this structure does not have the puzzlement that glue got into the magnetic gap, has improved the pure tone yield of sound production device 100.

Specifically, the vibrating diaphragm 21 includes two sub-vibrating diaphragms 211 respectively disposed at two opposite sides of the magnetic circuit system 3 at intervals, and a connecting portion 212 connecting the two sub-vibrating diaphragms 211 and fixed to the frame 1, where each sub-vibrating diaphragm 211 includes a vibrating portion 2111, a bent portion 2112 bent and extended from a periphery of the vibrating portion 2111, and a fixing portion 2113 bent and extended from a side of the bent portion 2112 away from the vibrating portion 2111; the fixing portion 2113 includes a first fixing portion 21131 located on a side of the vibrating portion 2111 away from the upper cover 4 and fixed to the frame 1, a second fixing portion 21132 disposed opposite to the first fixing portion 21131 at an interval and fixed to the magnetic circuit system 3, and a third fixing portion 21133 connecting the first fixing portion 21131 and the second fixing portion 21132 and fixed to the frame 1. The upper cover 4 includes a cover plate 41 disposed at an interval from the second fixing portion 21132, and an enclosure wall 42 extending from the peripheral edge of the cover plate 41 to the magnetic circuit system 3, and the enclosure wall 42 is fixedly connected to both the second fixing portion 21132 and the connecting portion 212.

The vibration system 2 further includes a voice coil 22 inserted into the magnetic gap 30 to drive the sub-diaphragm 211 to vibrate, and a bobbin 23 suspending the voice coil 22 in the magnetic gap 30.

In the present embodiment, the voice coil 22 has a rectangular configuration with rounded corners, but is not limited thereto.

The bobbin 23 includes two bobbin bodies 231 that are fixed in respectively the sub-diaphragm 211 is close to magnetic circuit 3 one side, by the bobbin body 231 to the first bobbin connecting arm 232 that the voice coil 22 direction extended formation and connect two the bobbin body 231 just is two second bobbin connecting arms 233 of relative setting, first bobbin connecting arm 232 extends to in the magnetic gap 30 and with the voice coil 22 is connected, two the second bobbin connecting arm 233 is located respectively the outside of two minor axes of voice coil 22, first bobbin connecting arm 232 connect in adjacent the second bobbin connecting arm 233. In this embodiment, each bobbin body 231 extends to form two first bobbin connecting arms 232, and the two first bobbin connecting arms 232 are respectively connected to two round corners at two ends of the long axis of the adjacent voice coil 22; the two framework bodies 231 are respectively formed in an extending manner and are oppositely arranged to form two first framework connecting arms 232; skeleton body 231, first skeleton linking arm 232 and second skeleton linking arm 233 enclose into the loop configuration and in order to form the space of stepping down to magnetic circuit 3 for space utilization is better, and the volume is littleer.

The position of the sub-diaphragm 211 corresponding to the first skeleton connecting arm 232 is provided with an avoiding space 20, that is, the sub-diaphragm 211 is recessed from a side thereof close to the magnetic circuit system 3 to a direction away from the magnetic circuit system 3 to form the avoiding space 20, and the avoiding space 20 is arranged opposite to the first skeleton connecting arm 232 to provide a vibration space for the first skeleton connecting arm 232. In this embodiment, each sub-diaphragm 211 includes two avoidance spaces 20, and the two avoidance spaces 20 are disposed at two opposite ends of the second fixing portion 21132. The voice coil 22 drives the sub-diaphragm 211 to vibrate through the bobbin 23, and because the sub-diaphragm 211 corresponds to the first bobbin connecting arm 232, the avoidance space 20 is formed, so that the vibration space of the bobbin 23 becomes large, and the acoustic performance of the sound generating device 100 is better.

Preferably, in the present embodiment, the recess depth of the avoiding space 20 is less than or equal to the height of the ring-folded portion 2112 along the vibration direction, that is, the height of the avoiding space 20 does not exceed the height of the ring-folded portion 2112, so that the acoustic performance of the sound generating device 100 is better while the height of the sound generating device is not increased. Of course, the depth of the recess of the avoidance space 20 can be flexibly adjusted according to the height of the first framework connecting arm 232 along the vibration direction, and the acoustic performance is improved under the condition that the strength of the first framework connecting arm 232 is ensured.

The vibration system 2 further comprises an elastic conductive piece 24 fixed on one side of the basin frame 1 away from the diaphragm 21, wherein the elastic conductive piece 24 comprises an elastic conductive piece main body 241 and a first extension arm 242 and a second extension arm 243 which are respectively formed by extending two opposite sides of the elastic conductive piece main body 241; the first extension arm 242 is fixed to the frame 1, the second extension arm 243 is fixed to one end of the framework body 231, which is far away from the vibration portion 2111, and the second extension arm 243 is provided with a bonding pad 244 electrically connected to the voice coil 22.

In order to suppress the lateral vibration of the voice coil 22, the vibration system 2 further includes an auxiliary diaphragm 25 attached to the side of the elastic conductive member 24 away from the diaphragm 21.

The magnetic circuit system 3 comprises a magnetic yoke 31 fixed on one side of the basin frame 1 far away from the diaphragm 21, a main magnetic steel assembly 32 fixedly arranged on the magnetic yoke 31, and an auxiliary magnetic steel assembly 33 spaced from the main magnetic steel assembly 32 to form the magnetic gap 30, wherein the second fixing portion 21132 is fixed on the auxiliary magnetic steel assembly 33.

Further, the second fixing portion 21132 includes a first segment 211321 fixed to the secondary magnetic steel assembly 33, a second segment 211322 extending from an end of the first segment 211321 close to the first skeleton connecting arm 232 in a direction away from the magnetic circuit system 3, a third segment 211323 extending from an end of the second segment 211322 away from the first segment 211321 in a bending manner and spaced apart from the first skeleton connecting arm 232, a fourth segment 211324 extending from an end of the third segment 211323 away from the second segment 211322 in a direction close to the third fixing portion 21133 and connected to the third fixing portion 21133, and a fifth segment 211325 extending from a side of the first segment 211321 away from the secondary magnetic steel assembly 33 in a protruding manner toward the upper cover 4, and the avoiding space 20 is defined by the second segment 211322, the third segment 211323, and the fourth segment 211324; the third segment 211323 and the fourth segment 211324 are fixed at the end far away from the second segment 211322 of the basin stand 1.

The utility model provides an above only do the embodiment of the utility model not consequently the restriction the patent scope of the utility model, all utilize the utility model discloses equivalent structure or equivalent flow transform that the content of description and drawing was done, or direct or indirect application is in other relevant technical field, all the same reason is included the utility model discloses an in the patent protection scope.

Claims

1. A sound production device comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is respectively fixed on the basin frame, the magnetic circuit system drives the vibration system to vibrate and produce sound, the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a vibration diaphragm fixed on the basin frame, the sound production device also comprises an upper cover which is covered on the vibration diaphragm, and the sound production device is characterized in that the basin frame, the vibration diaphragm and the upper cover are integrally molded by injection;

the vibrating diaphragm comprises two sub vibrating diaphragms which are arranged on two opposite sides of the magnetic circuit system at intervals respectively and a connecting part which is connected with the two sub vibrating diaphragms and fixed on the basin frame, and the upper cover is positioned between the two sub vibrating diaphragms; each sub-diaphragm comprises a vibrating part, a corrugated rim part bent and extended from the periphery of the vibrating part and a fixing part bent and extended from one side of the corrugated rim part far away from the vibrating part; the fixing part comprises a first fixing part which is positioned on one side of the vibrating part far away from the upper cover and is fixed on the basin frame, a second fixing part which is arranged opposite to the first fixing part at an interval and is fixed on the magnetic circuit system, and a third fixing part which is connected with the first fixing part and the second fixing part and is fixed on the basin frame;

2. The sounder device according to claim 1, wherein the frame is a steel ring.

3. The sounding device according to claim 1, wherein the vibration system further comprises a voice coil inserted into the magnetic gap to drive the sub-diaphragm to vibrate, a bobbin suspending the voice coil in the magnetic gap, and a relief space formed by a side of the sub-diaphragm close to the magnetic circuit being recessed away from the magnetic circuit;

the framework comprises two framework bodies and a first framework connecting arm, the two framework bodies are respectively fixed on one sides of the two sub-diaphragms close to the magnetic circuit system, the first framework connecting arm is formed by extending the framework bodies to the direction of the voice coil, and the first framework connecting arm extends into the magnetic gap and is connected with the voice coil;

4. The sound production device as claimed in claim 3, wherein the magnetic circuit system comprises a magnetic yoke fixed to a side of the frame away from the diaphragm, a main magnetic steel component fixedly disposed on the magnetic yoke, and a secondary magnetic steel component spaced apart from the main magnetic steel component to form the magnetic gap, and the second fixing portion is fixed to the secondary magnetic steel component.

5. The sounding device according to claim 4, wherein the voice coil is a rectangular structure with rounded corners, each of the bobbin bodies extends two of the first bobbin connecting arms, the two first bobbin connecting arms are respectively connected to two rounded corners at two ends of a long axis of the voice coil, and the avoiding spaces are disposed at two opposite ends of the second fixing portion.

6. The sounder device according to claim 5, wherein the housing further comprises two second housing connecting arms disposed opposite each other and connecting the two housing bodies.

7. The sounding device according to claim 6, wherein two of the second bobbin connecting arms are respectively located outside two short axes of the voice coil, and the first bobbin connecting arm is connected to the adjacent second bobbin connecting arm.

8. The sounding device according to claim 7, wherein the second fixing portion includes a first section fixed to the secondary magnetic steel assembly, a second section extending from an end of the first section close to the first frame connecting arm to a direction away from the magnetic circuit system, a third section extending from an end of the second section away from the first section to a direction away from the first frame connecting arm, a fourth section extending from an end of the third section away from the second section to a direction close to the third fixing portion and connected to the third fixing portion, and a fifth section extending from a side of the first section away from the secondary magnetic steel assembly to a direction protruding toward the upper cover, and the avoiding space is defined by the second section, the third section, and the fourth section; and one ends of the third section and the fourth section, which are far away from the second section, are fixed on the basin stand.

9. The sounder device according to claim 3, wherein the vibration system further comprises a resilient conductive member secured to a side of the frame remote from the diaphragm, the resilient conductive member comprising a resilient conductive member body and first and second extension arms extending from opposite sides of the resilient conductive member body; the first extension arm is fixed in the basin frame, the second extension arm is fixed in the skeleton body is kept away from the one end of vibration portion, the second extension arm be equipped with the pad that the voice coil loudspeaker voice coil electricity is connected.

10. The sounder device according to claim 9, wherein the vibration system further comprises an auxiliary diaphragm attached to a side of the resilient conductive member remote from the diaphragm.