CN214101770U

CN214101770U - sound device

Info

Publication number: CN214101770U
Application number: CN202023202497.5U
Authority: CN
Inventors: 肖波; 令狐荣林
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Optoelectronic Changzhou Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-08-31
Anticipated expiration: 2030-12-25

Abstract

The utility model provides a sound-generating device, which comprises a basin frame, a vibration system and a magnetic circuit system respectively fixed on the basin frame; the vibration system comprises a vibrating film fixed on the basin frame and driving the vibrating film A voice coil that vibrates and emits sound, the diaphragm includes an outer diaphragm fixed on the basin frame, an inner diaphragm placed inside the outer diaphragm, and a dome connected to the inner diaphragm, the magnetic circuit system It includes a magnetic yoke and a main magnet steel arranged on the magnetic yoke. The inner diaphragm includes an inner folded ring, a first inner fixing portion and a second inner fixing portion respectively extending from both sides of the inner foldable ring, and a receiving portion enclosed by the second inner fixing portion. The magnetic circuit system further includes a first secondary magnetic steel fixed on the main magnetic steel and a second secondary magnetic steel accommodated in the accommodating portion, and the ball top is sandwiched between the first secondary magnetic steel and the second secondary magnetic steel. between the second pair of magnets. The spherical top of the above-mentioned sounding device is firmly connected, so that the vibration of the diaphragm is more stable.

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 of the related art includes a frame, and a vibration system and a magnetic circuit system having a magnetic gap, which are respectively fixed to the frame. The vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil inserted in the magnetic gap to drive the vibrating diaphragm to vibrate and sound. However, in the sound production device of the related art, only the outer edge of the diaphragm is fixed on the frame, and the other part of the diaphragm is integrally suspended, so that the diaphragm cannot be positioned and is easily damaged.

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

[ Utility model ] content

An object of the utility model is to provide a sound production device of ability location vibrating diaphragm.

In order to achieve the above object, the present invention provides a sound production device, which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame; the vibration system comprises a vibration diaphragm fixed on the basin frame and a voice coil inserted in the magnetic gap to drive the vibration diaphragm to vibrate and sound, the vibration diaphragm comprises an outer vibration diaphragm fixed on the basin frame, an inner vibration diaphragm arranged in the outer vibration diaphragm and connected with the outer vibration diaphragm, and a dome connected with the inner vibration diaphragm, the magnetic circuit system comprises a magnetic yoke and main magnetic steel arranged on the magnetic yoke, the inner vibration diaphragm comprises an inward-folding ring, a first inner fixing part bent and extended from the outer edge of the inward-folding ring towards the direction far away from the inward-folding ring and connected with the outer vibration diaphragm, a second inner fixing part bent and extended from the inner edge of the inward-folding ring towards the direction far away from the magnetic circuit system and connected with the dome, and an accommodating part formed by enclosing the second inner fixing part, the magnetic circuit system further comprises a first pair of magnetic steels fixed on the main magnetic steel and a second pair of magnetic steels accommodated in the accommodating part, the ball top clamp is arranged between the first auxiliary magnetic steel and the second auxiliary magnetic steel.

Preferably, the dome is made of a metal material.

Preferably, the second inner fixing portion is formed by protruding from the inward-folded ring toward the end away from the main magnet, and the dome is connected with the end of the second inner fixing portion close to the main magnet.

Preferably, the second inner fixing portion abuts against the second secondary magnetic steel.

Preferably, the magnetic circuit system further includes a plurality of third sub-magnetic steels disposed on the magnetic yoke, and the plurality of third sub-magnetic steels and the main magnetic steel are disposed at intervals to form the magnetic gap.

Preferably, one end of the second secondary magnetic steel, which is far away from the main magnetic steel, protrudes out of one end of the second inner fixing part, which is far away from the magnetic yoke.

Preferably, the sounding device further includes a skeleton connecting the outer diaphragm and the inner diaphragm, the outer diaphragm includes an outward-folding ring, a first outer fixing portion extending from an outer edge of the outward-folding ring and extending toward the magnetic circuit, a second outer fixing portion extending from an inner edge of the outward-folding ring toward a direction away from the outward-folding ring, and a first step portion protruding from the second outer fixing portion toward a direction away from the magnetic circuit, the first outer fixing portion is fixedly connected to the frame, and the skeleton is connected to the second outer fixing portion and the first inner fixing portion at the same time.

Preferably, the bobbin includes a connection body, a first connection portion bent and extended from an outer edge of the connection body toward the magnetic circuit system, and a second connection portion bent and extended from an inner edge of the connection body toward the magnetic circuit system, the connection body connects the second outer fixing portion and the first inner fixing portion, and the second connection portion is connected to the voice coil.

Preferably, the outer diaphragm further includes a first step portion protruding from the second outer fixing portion toward a direction away from the magnetic circuit system, the frame further includes a second step portion protruding from the connecting body toward the direction away from the magnetic circuit system, and the second step portion and the first step portion are engaged with each other and abutted against each other.

Preferably, the vibration system is still including being fixed in the basin frame and with the relative just interval elastic support subassembly that sets up of outer vibrating diaphragm, elastic support subassembly includes elastic connection spare and supplementary membrane, elastic connection spare's one end is connected the basin frame with first connecting portion, the other end with supplementary membrane is connected, elastic connection spare is flexible circuit board, its with the voice coil loudspeaker voice coil electricity is connected.

Compared with the prior art, the utility model provides a ball top clamp of above-mentioned sound production device's vibrating diaphragm is located between first pair magnet steel and the vice magnet steel of second, ball top firm in connection can be right outer vibrating diaphragm with interior vibrating diaphragm forms firm support, makes the vibrating diaphragm outer vibrating diaphragm with the vibration of interior vibrating diaphragm is more steady, and then makes above-mentioned sound production device can stabilize the sound production.

[ 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 an exploded view of the sound device of the present invention;

fig. 2 is a schematic perspective view of an inner diaphragm of the sound production device shown in fig. 1;

FIG. 3 is a schematic assembled view of the sound device shown in FIG. 1;

FIG. 4 is a cross-sectional view of the sound device shown in FIG. 3 taken along the direction from the first secondary magnetic steel to the first secondary magnetic steel in FIG. 3;

fig. 5 is an enlarged schematic structural view of the sound generating device shown in fig. 4 at the second secondary magnetic steel.

[ 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 sound-producing device 100 according to the present invention includes a frame 1, a vibration system 2 fixed to the frame 1, and a magnetic circuit system 3 having a magnetic gap 30. The basin stand 1 is used for supporting the vibration system 2 and the magnetic circuit system 3.

The vibration system 2 comprises a vibrating diaphragm 21 fixed on the basin frame 1, a voice coil 22 inserted in the magnetic gap 30 to drive the vibrating diaphragm 21 to vibrate and sound, and an elastic support assembly 23 fixed on the basin frame 1 and opposite to the vibrating diaphragm 21 and arranged at intervals. The vibrating diaphragm 21 includes outer vibrating diaphragm 211, interior vibrating diaphragm 212, with the dome 213 that interior vibrating diaphragm 212 is connected and connect outer vibrating diaphragm 211 with the skeleton 214 of interior vibrating diaphragm 212, outer vibrating diaphragm 211 with basin frame 1 is connected, voice coil 22 with skeleton 214 is connected. The dome 213 is made of a metal material, and is not easily deformed, and can stably support and position the diaphragm 21, thereby preventing the diaphragm 21 from being easily damaged in a vibration process due to suspension.

In other alternative embodiments, the skeleton 214 may be omitted, and the outer diaphragm 211 is directly connected to the inner diaphragm 212.

Specifically, as shown in fig. 1 and fig. 2, the outer diaphragm 211 includes an outer folding ring 2111, a first outer fixing portion 2112 extending horizontally from an outer edge of the outer folding ring 2111 and extending toward the magnetic circuit system 3, a second outer fixing portion 2113 extending horizontally from an inner edge of the outer folding ring 2111 toward a direction away from the outer folding ring 2111, and a first step portion 2114 protruding from the second outer fixing portion 2113 toward a direction away from the magnetic circuit system 3, and the first outer fixing portion 2112 is fixedly connected to the frame 1. The projected area of the second outer fixing portion 2113 in the vibration direction of the diaphragm 21 is larger than the projected area of the first outer fixing portion 2112, and the first step portion 2114 is a step structure formed by protruding a partial region of one end of the second outer fixing portion 2133 away from the magnetic circuit system 3. Alternatively, the first step portion 2114 is formed in the second outer fixing portion 2113 by punching.

The inner diaphragm 212 includes an inward-folding ring 2121, a first inner fixing portion 2122 extending horizontally from an outer edge of the inward-folding ring 2121 toward a direction away from the inward-folding ring 2121, a second inner fixing portion 2123 extending from an inner edge of the inward-folding ring 2121 toward a direction away from the magnetic circuit system 2, and a receiving portion 2124 enclosed by the second inner fixing portion 2123, the dome 213 is connected to an end of the second inner fixing portion 2123 close to the magnetic circuit system 3, and the dome 213 is disposed opposite to the receiving portion 2124, that is, along a vibration direction of the diaphragm 21, projections of the dome 213 and the receiving portion 2124 at least partially overlap. Specifically, the second inner fixing part 2123 extends from one side of the inward-folded ring 2121, and the first inner fixing part 2122 extends from the other side of the inward-folded ring 2121.

The bobbin 214 includes a connecting body 2141 in an annular thin plate shape, a first connecting portion 2142 extending from the outer edge of the connecting body 2141 toward the magnetic circuit system 3, a second connecting portion 2143 extending from the inner edge of the connecting body 2141 toward the magnetic circuit system 3, and a second step portion 2144 extending away from the magnetic circuit system 3 toward the connecting body 2141, the connecting body 2141 connects the second outer fixing portion 2113 and the first inner fixing portion 2122, and the second connecting portion 2143 connects the voice coil 22. The second step portion 2114 is a step structure formed by protruding a partial region of one end of the connecting body 2141 away from the magnetic circuit system 3, and the second step portion 2144 and the first step portion 2114 are engaged and abutted with each other, so that the firmness of connection between the connecting body 2141 and the second outer fixing portion 2113 is increased. Optionally, the second stepped portion 2144 is formed on the connecting body 2141 by stamping.

In addition, since the second outer fixing portion 2113 has a larger projection area in the vibration direction of the diaphragm 21, the connection area with the connecting body 2141 is made large, thereby increasing the connection stability of the second outer fixing portion 2113 and the connecting body 2141. Meanwhile, the second external fixing portion 2113 may also increase the vibration area of the diaphragm 21, thereby improving the acoustic performance of the sound production device 100.

The receiving portion 2124 is an annular through hole surrounded by the second inner fixing portion 2123, the dome 213 and one end of the second inner fixing portion 2123 close to the magnetic circuit system 3 are connected to close one end of the receiving portion 2124, and one end of the second inner fixing portion 2123 far from the magnetic circuit system 3 is an open structure.

As shown in fig. 1 and 4, the vibration system 2 further includes an elastic support component 23 fixed to the frame 1 and opposite to the outer diaphragm 211, and the elastic support component 23 is connected to the first connection portion 2142 at a side away from the frame 1.

Specifically, the elastic support assembly 23 includes an elastic connection member 231 connecting the frame 1 and the first connection portion 2142, and an auxiliary membrane 232 connected to an end of the elastic connection member 231 remote from the frame 1, wherein the elastic connection member 231 is electrically connected to the voice coil 22 through a connection wire. Optionally, the elastic connection member 231 is a flexible circuit board, the sound generating device 100 can transmit a signal to the voice coil body 221 through the elastic connection member 231, and the elastic connection member 231 plays a role in both fixing and electrical connection.

Referring to fig. 1 to 5, the magnetic circuit system 3 includes a magnetic yoke 31, a main magnetic steel 32 and a plurality of third sub-magnetic steels 33 disposed on the magnetic yoke 31, and an upper cover plate 34 connecting the main magnetic steel 31 and the plurality of third sub-magnetic steels 33. The third secondary magnetic steels 33 and the main magnetic steel 31 are spaced to form the magnetic gap 30, and the adjacent third secondary magnetic steels 33 are also spaced to form a channel, and a connection line of the voice coil 22 can pass through the channel and is electrically connected to the elastic connection member 231. In this embodiment, the second inner fixing portion 2123 of the inner diaphragm 212 protrudes from the side of the inward folding ring 2121 away from the first inner fixing portion 2122 toward the main magnetic steel 32, and an end of the second inner fixing portion 2123 away from the main magnetic steel 32 is closer to the main magnetic steel 32 than an end of the inward folding ring 2121 away from the main magnetic steel 32.

The upper cover plate 34 is substantially plate-shaped, a through hole 341 is formed in the middle of the upper cover plate, one end of the upper cover plate 34 is sleeved on the main magnetic steel 32 through the through hole 341 and connected with the plurality of third auxiliary magnetic steels 33, and the other end of the upper cover plate is connected with the basin stand 1, so that the magnetic circuit system 3 is fixed on the basin stand 1.

Further, the magnetic circuit system 3 further includes a first secondary magnetic steel 35 fixed to one end of the main magnetic steel 32 away from the magnetic yoke 31 and a second secondary magnetic steel 36 accommodated in the accommodating portion 2124 and disposed on the first secondary magnetic steel 35, and the first secondary magnetic steel 35 and the second secondary magnetic steel 36 are disposed opposite to each other. The end of the second inner fixing part 2123 away from the magnetic yoke 31 is closer to the magnetic yoke 31 than the second secondary magnetic steel 36, that is, the end of the second secondary magnetic steel 36 away from the magnetic yoke 31 protrudes from the end of the second inner fixing part 2123 away from the magnetic yoke 31. The dome 213 presss from both sides and locates first vice magnet steel 35 with between the vice magnet steel 36 of second, through first vice magnet steel 35 with the vice magnet steel 36 of second is in on the vibration direction of vibrating diaphragm 21 right the dome 213 carries on spacingly, avoids the dome 213 along with outer vibrating diaphragm 211 with interior vibrating diaphragm 212 vibrates together. In order to make the diaphragm 21 more firmly connected to the magnetic circuit system 3, the second inner fixing portion 2123 abuts against the outer wall surface of the second secondary magnetic steel 36.

Since the first auxiliary magnetic steel 35 is accommodated and fixed in the accommodating portion 2124, the second inner fixing portion 2123 can limit the first auxiliary magnetic steel 35 in a direction perpendicular to the vibration direction of the diaphragm 21, so that the stability of fixing the first auxiliary magnetic steel 35 is increased.

In this embodiment, in order to increase the firmness of the connection between the dome 213 and the first secondary magnetic steel 35 and the second secondary magnetic steel 36, the dome 213 is fixed to the first secondary magnetic steel 35 and the second secondary magnetic steel 36 by bonding with glue.

It is thus clear that, compare with the correlation technique, the utility model provides an above-mentioned sound production device's vibrating diaphragm the ball top clamp is located between the vice magnet steel of first pair magnet steel and second, ball top firm in connection can be right outer vibrating diaphragm with interior vibrating diaphragm forms firm support, makes the vibrating diaphragm outer vibrating diaphragm with the vibration of interior vibrating diaphragm is more steady, and then makes above-mentioned sound production device can stabilize the sound production.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A sounding device comprising a basin frame and a vibration system fixed to the basin frame respectively and a magnetic circuit system with a magnetic gap; the vibration system comprising a vibrating film fixed to the basin frame and a vibrating film inserted in the basin frame. The magnetic gap is used to drive the vibrating membrane to vibrate and sound the voice coil, and the vibrating membrane includes an outer vibrating membrane fixed on the basin frame, an inner vibrating membrane placed inside the outer vibrating membrane and connected with the outer vibrating membrane, and The spherical top connected with the inner vibrating membrane, the magnetic circuit system includes a magnetic yoke and a main magnet steel arranged on the magnetic yoke, and it is characterized in that the inner vibrating membrane The outer edge of the folded ring extends away from the inner folded ring and is connected to the first inner fixing portion connected to the outer diaphragm, and the inner edge of the inner folded ring extends away from the magnetic yoke and is connected to the first inner fixing portion. a second inner fixing part connected to the dome and a receiving part enclosed by the second inner fixing part; the magnetic circuit system further comprises a first auxiliary magnetic steel fixed on the main magnetic steel; the second secondary magnetic steel in the receiving part, and the spherical top is sandwiched between the first secondary magnetic steel and the second secondary magnetic steel.

2. The sound-generating device according to claim 1, wherein the dome is made of a metal material.

3 . The sounding device according to claim 1 or 2 , wherein the dome is connected to an end of the second inner fixing part close to the main magnet steel. 4 .

4 . The sounding device according to claim 3 , wherein the second inner fixing portion abuts against the second secondary magnetic steel. 5 .

5 . The sounding device according to claim 3 , wherein the magnetic circuit system further comprises a plurality of third sub-magnets arranged on the yoke, a plurality of the third sub-magnets and the The main magnets are spaced to form the magnetic gap.

6 . The sounding device according to claim 3 , wherein an end of the second secondary magnetic steel away from the main magnetic steel protrudes from an end of the second inner fixing portion away from the magnetic yoke. 7 .

7 . The sound-generating device according to claim 1 , wherein the sound-generating device further comprises a skeleton connecting the outer vibrating membrane and the inner vibrating membrane, and the outer vibrating membrane A first outer fixing portion extending from the outer edge of the outer fold and bent toward the direction of the magnetic circuit system and a second outer fixing portion extending from the inner edge of the outer fold in a direction away from the outer fold, so The first outer fixing part is fixedly connected with the basin frame, and the frame is simultaneously connected with the second outer fixing part and the first inner fixing part.

8 . The sounding device according to claim 7 , wherein the frame comprises a connecting body, a first connecting portion bent and extending from the outer edge of the connecting body toward the magnetic circuit system, and a first connecting portion extending from the outer edge of the connecting body. 9 . The inner edge of the connecting body is bent towards the magnetic circuit system and extends toward the second connecting portion, the connecting body connects the second outer fixing portion and the first inner fixing portion, and the second connecting portion is connected to the second connecting portion. the voice coil connection.

9 . The sound-generating device according to claim 8 , wherein the outer diaphragm further comprises a first step portion protruding from the second outer fixing portion in a direction away from the magnetic circuit system, and the The skeleton further includes a second step portion protruding away from the magnetic circuit system from the connecting body, and the second step portion and the first step portion are mutually engaged and abutted.

10 . The sound-generating device according to claim 5 , wherein the vibration system further comprises an elastic support assembly fixed to the basin frame and opposite to the outer diaphragm and arranged at intervals, the elastic support assembly comprising: 10 . An elastic connecting piece and an auxiliary film, one end of the elastic connecting piece is connected with the basin frame and the first connecting part, and the other end is connected with the auxiliary film, the elastic connecting piece is a flexible circuit board, which is connected with the The voice coil is electrically connected.