CN216700306U

CN216700306U - Miniature loudspeaker

Info

Publication number: CN216700306U
Application number: CN202122753760.8U
Authority: CN
Inventors: 周喻; 许飞龙
Original assignee: Shenzhen Weishi Acoustics Co Ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-06-07
Anticipated expiration: 2031-11-11

Abstract

The utility model discloses a micro loudspeaker, which comprises a vibrating diaphragm assembly, a voice coil and a framework, wherein the framework is connected between the voice coil and the vibrating diaphragm assembly, the framework comprises an extension arm and a plurality of step parts arranged on the extension arm, the extension arm is connected to the bottom of the vibrating diaphragm assembly, the step parts are connected to the corner parts of the voice coil, and heat dissipation gaps are formed between two adjacent step parts and the vibrating diaphragm assembly as well as between the two adjacent step parts and the voice coil; the miniature loudspeaker provided by the utility model has the characteristic of stable acoustic performance, the framework is arranged between the voice coil and the vibrating diaphragm assembly, so that the volume of the voice coil positioned in the magnetic gap is increased, the idle consumption of a vibration system is reduced, the extension arm is arranged to be connected with the vibrating diaphragm assembly, the reliability of the connection of the framework and the vibrating diaphragm assembly is ensured, the heat inside the voice coil can be effectively dissipated through the heat dissipation gap, in addition, the air sound pressure inside the voice coil can also be leaked out through the heat dissipation gap, and the acoustic performance of the miniature loudspeaker is effectively improved.

Description

Miniature loudspeaker

Technical Field

The utility model relates to the technical field of acoustic devices, in particular to a micro loudspeaker.

Background

The micro-speaker is widely applied to portable electronic equipment such as mobile phones, notebook computers, hearing aids and the like. With the rapid development of these portable electronic devices, there is an increasing demand for miniature electro-acoustic devices to be used therein.

The loudspeaker generally comprises a frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are arranged on the frame; the magnetic circuit system is provided with a magnetic gap, a magnetic field is generated in the magnetic gap, the vibration system comprises a vibration diaphragm, a ball top and a voice coil, the ball top is connected with the vibration diaphragm, and the voice coil is connected with the ball top and extends into the voice coil in the magnetic gap. When the loudspeaker works, the voice coil is electrified and drives the ball top and the vibrating diaphragm to vibrate under the action of the magnetic field of the magnetic gap so as to drive the air to produce sound.

However, in the speaker structure of the prior art, the dome completely covers the top of the voice coil, so that the inner side of the voice coil is not communicated with the outer region thereof, the heat dissipated by the magnetic circuit system and the voice coil is gathered in the space formed by the dome and the inner side of the voice coil, and the continuous high temperature causes various abnormalities, such as wire breakage, silence and the like, which seriously affects the acoustic performance of the speaker.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: a micro speaker with stable acoustic performance is provided.

In order to solve the technical problems, the utility model adopts the technical scheme that: the utility model provides a micro loudspeaker, includes vibrating diaphragm subassembly, voice coil loudspeaker voice coil and skeleton, the skeleton connect in the voice coil loudspeaker voice coil with between the vibrating diaphragm subassembly, the skeleton includes the extension arm and locates a plurality of step portions on the extension arm, the extension arm connect in the bottom of vibrating diaphragm subassembly, step portion connect in the bight of voice coil loudspeaker voice coil, adjacent two step portion with the vibrating diaphragm subassembly and form heat dissipation clearance between the voice coil loudspeaker voice coil.

Further, along the height direction projection of voice coil loudspeaker voice coil, the extension arm is located the inboard projection region of voice coil loudspeaker voice coil.

Further, the quantity of skeleton is two, two the skeleton is located a set of opposite side of voice coil loudspeaker voice coil, the skeleton includes one extension arm and two step portion, the step portion is connected the both ends of extension arm.

Furthermore, the framework is of an integrated structure formed integrally.

Furthermore, step portion includes pad high portion and the first connecting portion that link to each other, first connecting portion connect in the voice coil loudspeaker voice coil top surface, pad high portion along the direction of height of voice coil loudspeaker voice coil extend and with extension arm is connected.

Furthermore, the step portion further comprises a second connecting portion connected to one end of the first connecting portion, which is far away from the raised portion, and the second connecting portion is connected to the outer side wall of the voice coil.

Furthermore, still include basin frame and centering disk, the vibrating diaphragm subassembly and centering disk respectively with the basin frame is connected, step portion still including connect in the second connecting portion are kept away from the third connecting portion of the one end of first connecting portion, the third connecting portion with centering disk is connected.

Furthermore, one side of the extension arm, which is far away from the diaphragm component, is provided with a heat conduction groove.

Further, the vibrating diaphragm assembly comprises a dome and a sound film which are connected, and the extension arm is connected with the dome.

The utility model has the beneficial effects that: the miniature loudspeaker provided by the utility model has the characteristic of stable acoustic performance, the framework is arranged between the voice coil and the vibrating diaphragm assembly, so that the volume of the voice coil in the magnetic gap is increased, the idle consumption of a vibration system is reduced, the extension arm is arranged to be connected with the vibrating diaphragm assembly, the reliability of the connection of the framework and the vibrating diaphragm assembly is ensured, and the heat dissipation gaps are formed between the two adjacent step parts and the vibrating diaphragm assembly as well as the voice coil, so that the heat on the inner side of the voice coil can be effectively dissipated, in addition, the air sound pressure on the inner side of the voice coil can also be leaked out through the heat dissipation gaps, and the acoustic performance of the miniature loudspeaker is effectively improved.

Drawings

FIG. 1 is an exploded view of a micro-speaker according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a micro-speaker according to an embodiment of the present invention (after a diaphragm assembly is hidden);

FIG. 3 is a schematic cross-sectional structure diagram of a micro-speaker according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a framework of a micro-speaker according to an embodiment of the present invention;

fig. 5 is another schematic structural diagram of a micro-speaker according to an embodiment of the utility model (after the diaphragm assembly is hidden).

Description of the reference symbols:

1. a basin stand; 11. a border washer; 12. a centering support; 13. a secondary membrane; 2. a voice coil; 3. a framework; 31. an extension arm; 311. a heat conducting groove; 32. a step portion; 321. a raised portion; 322. a first connection portion; 323. a second connecting portion; 324. a third connecting portion; 4. a diaphragm assembly; 41. a sound membrane; 42. a ball top; 5. a central washer; 51. a position avoiding groove; 6. central magnetic steel; 7. edge magnetic steel; 8. a yoke iron.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 5, a micro speaker includes a diaphragm assembly 4, a voice coil 2 and a bobbin 3, the bobbin 3 is connected between the voice coil 2 and the diaphragm assembly 4, the bobbin 3 includes an extension arm 31 and a plurality of step portions 32 disposed on the extension arm 31, the extension arm 31 is connected to the bottom of the diaphragm assembly 4, the step portions 32 are connected to the corners of the voice coil 2, and a heat dissipation gap is formed between two adjacent step portions 32 and the diaphragm assembly 4 and the voice coil 2.

As can be seen from the above description, the beneficial effects of the present invention are: set up skeleton 3 between voice coil loudspeaker voice coil 2 and vibrating diaphragm subassembly 4 for the volume that voice coil loudspeaker voice coil 2 is located the magnetic gap increases, has reduced vibration system's idle consumption, set up extension arm 31 with vibrating diaphragm subassembly 4 is connected, has ensured the reliability that skeleton 3 is connected with vibrating diaphragm subassembly 4, and form the heat dissipation clearance between two adjacent step portion 32 and vibrating diaphragm subassembly 4 and voice coil loudspeaker voice coil 2, makes the inboard heat of voice coil loudspeaker voice coil 2 distribute away effectively, and in addition, the inboard air acoustic pressure of voice coil loudspeaker voice coil 2 still can reveal away through the heat dissipation clearance, the effectual acoustic performance who improves this micro speaker.

Further, projected along the height direction of the voice coil 2, the extension arm 31 is located in the projection area inside the voice coil 2.

As can be seen from the above description, the extension arm 31 is located inside the voice coil 2, so as to avoid the heat dissipation gap, thereby facilitating heat dissipation.

Further, the quantity of skeleton 3 is two, two skeleton 3 is located a set of opposite side of voice coil 2, skeleton 3 includes one extension arm 31 and two step portion 32, step portion 32 is connected the both ends of extension arm 31.

As can be seen from the above description, the number of the skeletons 3 can be set according to the actual application requirement.

Further, the framework 3 is an integrated structure formed integrally.

As can be seen from the above description, the framework 3 has a simple structure and is easy to manufacture and mold.

Further, the step portion 32 includes a pad-up portion 321 and a first connection portion 322 connected to each other, the first connection portion 322 is connected to the top surface of the voice coil 2, and the pad-up portion 321 extends along the height direction of the voice coil 2 and is connected to the extension arm 31.

As can be seen from the above description, the height of the raised portion 321 can be adjusted according to the actual application requirement.

Further, the step portion 32 further includes a second connecting portion 323 connected to one end of the first connecting portion 322 away from the raised portion 321, and the second connecting portion 323 is connected to an outer side wall of the voice coil 2.

As can be seen from the above description, the second connecting portion 323 is connected to the outer sidewall of the voice coil 2, so that the stability of the connection between the bobbin 3 and the voice coil 2 is improved.

Further, still include basin frame 1 and centering branch piece 12, vibrating diaphragm subassembly 4 and centering branch piece 12 respectively with basin frame 1 is connected, step portion 32 still including connect in second connecting portion 323 keeps away from the third connecting portion 324 of the one end of first connecting portion 322, third connecting portion 324 with centering branch piece 12 is connected.

As can be seen from the above description, the damper 12 is connected to the third connection portion 324, so that the stability of the vibration of the voice coil 2 is improved, and the improvement of the acoustic performance is facilitated.

Further, a heat conducting groove 311 is formed on one side of the extension arm 31 away from the diaphragm assembly 4.

As can be seen from the above description, the heat conduction groove 311 is disposed on the extension arm 31, so that heat can be dissipated more quickly, and the heat dissipation efficiency is improved.

Further, the diaphragm assembly 4 includes a dome 42 and a sound film 41 connected to each other, and the extension arm 31 is connected to the dome 42.

Example one

Referring to fig. 1 to 5, a first embodiment of the present invention is: a micro loudspeaker comprises a diaphragm component 4, a voice coil 2, a framework 3 and a magnetic circuit system, wherein the framework 3 is connected between the voice coil 2 and the diaphragm component 4, the framework 3 comprises an extension arm 31 and a plurality of step parts 32 arranged on the extension arm 31, the extension arm 31 is connected to the bottom of the diaphragm component 4, the diaphragm component 4 comprises a dome 42 and a sound film 41 which are connected, and the extension arm 31 is connected with the dome 42; the step portions 32 are connected to the corner portions of the voice coil 2, and heat dissipation gaps are formed between two adjacent step portions 32 and the diaphragm assembly 4 as well as between two adjacent step portions 2 and the voice coil 2, specifically in this embodiment, the number of the bobbins 3 is two, two bobbins 3 are located on a set of opposite sides of the voice coil 2, each bobbin 3 includes one extension arm 31 and two step portions 32, and the step portions 32 are connected to two ends of the extension arm 31; therefore, compared with the framework 3 with an integral structure, the loudspeaker is lighter in weight and conforms to the development trend of loudspeaker miniaturization; more specifically, skeleton 3 is integrated into one piece's integral type structure, skeleton 3 adopts magnesium aluminum alloy or other light metal punching press to form.

In addition, please refer to fig. 5, in some other embodiments, the number of the skeletons 3 may also be one, when the number of the skeletons 3 is one, the extension arm 31 is in a ring shape, and the extension arm 31 is connected with four step portions 32, which may be specifically set according to actual application requirements, which is not described herein.

Preferably, along the direction of height projection of voice coil 2, extension arm 31 is located the inboard projection region of voice coil 2, so, can be to the heat dissipation clearance is kept away the position, the heat dissipation of being convenient for.

Preferably, referring to fig. 3 and 4, the step portion 32 includes a raised portion 321 and a first connecting portion 322 connected to each other, the first connecting portion 322 is connected to the top surface of the voice coil 2, the raised portion 321 extends along the height direction of the voice coil 2 and is connected to the extension arm 31, and the height of the raised portion 321 can be specifically set according to the actual application requirement, so as to adjust the size of the heat dissipation gap; specifically, the step portion 32 further includes a second connecting portion 323 connected to one end of the first connecting portion 322, which is far away from the height-increasing portion 321, and the second connecting portion 323 is connected to the outer side wall of the voice coil 2, so that the connection stability of the bobbin 3 and the voice coil 2 is improved.

In detail, the micro speaker further includes a frame 1 and a centering branch 12, the diaphragm assembly 4 and the centering branch 12 are respectively connected to the frame 1, the step portion 32 further includes a third connecting portion 324 connected to one end of the second connecting portion 323 away from the first connecting portion 322, and the third connecting portion 324 is connected to the centering branch 12, so that the stability of the vibration of the voice coil 2 is improved; in more detail, in order to further improve the stability of the vibration of the voice coil 2, the bottom of the spider 12 is further provided with an auxiliary membrane 13 connected with the frame 1.

Optionally, please refer to fig. 4, in order to reduce the influence of the extension arm 31 on the heat dissipation performance, a heat conduction groove 311 is disposed on one side of the extension arm 31 away from the diaphragm assembly 4, so that heat can be dissipated more quickly, and the heat dissipation efficiency is improved.

Preferably, please refer to fig. 1 and 2, the magnetic circuit system includes a yoke 8, side magnetic steels 7, a center magnetic steel 6 and a center washer 5, the center magnetic steel 6 is disposed in the center of the yoke 8, the center washer 5 is disposed on the top of the center magnetic steel 6, the side magnetic steels 7 are respectively disposed on two sets of opposite sides of the yoke 8, a magnetic circuit gap is formed between the side magnetic steels 7 and the center magnetic steel 6, and at least a portion of the voice coil 2 is located in the magnetic circuit gap; specifically, the basin stand 1 is also provided with a side washer 11 connected with the side magnetic steel 7; more specifically, the central washer 5 is further provided with a position avoiding groove 51 for avoiding the position of the extension arm 31, so that the risk of interference between the extension arm 31 and the central washer 5 is reduced.

In summary, the micro-speaker provided by the utility model has the characteristic of stable acoustic performance, the framework is arranged between the voice coil and the diaphragm assembly, so that the volume of the voice coil in the magnetic gap is increased, the idle consumption of the vibration system is reduced, the extension arm is arranged to be connected with the diaphragm assembly, the reliability of the connection of the framework and the diaphragm assembly is ensured, and the heat dissipation gaps are formed between the two adjacent step parts and the diaphragm assembly as well as the voice coil, so that the heat inside the voice coil can be effectively dissipated, in addition, the air sound pressure inside the voice coil can also be leaked out through the heat dissipation gaps, and the acoustic performance of the micro-speaker is effectively improved.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the accompanying drawings, which are directly or indirectly applied to the related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a micro loudspeaker, includes vibrating diaphragm subassembly, voice coil loudspeaker voice coil and skeleton, the skeleton connect in the voice coil loudspeaker voice coil with between the vibrating diaphragm subassembly, its characterized in that, the skeleton includes the extension arm and locates a plurality of step portions on the extension arm, the extension arm connect in the bottom of vibrating diaphragm subassembly, step portion connect in the bight of voice coil loudspeaker voice coil, adjacent two step portion with the vibrating diaphragm subassembly and form heat dissipation clearance between the voice coil loudspeaker voice coil.

2. The micro-speaker as claimed in claim 1, wherein the extension arm is located in a projected area inside the voice coil, projected along a height direction of the voice coil.

3. The micro-speaker as claimed in claim 1, wherein the number of the bobbins is two, two bobbins are located at a set of opposite sides of the voice coil, the bobbins include one extension arm and two step portions, and the step portions connect both ends of the extension arm.

4. The microspeaker of claim 1 wherein the frame is a one-piece structure that is integrally formed.

5. The micro-speaker of claim 1, wherein the step portion comprises a raised portion and a first connecting portion connected to each other, the first connecting portion being connected to a top surface of the voice coil, the raised portion extending in a height direction of the voice coil and being connected to the extension arm.

6. The micro-speaker of claim 5, wherein the step portion further comprises a second connecting portion connected to an end of the first connecting portion away from the raised portion, the second connecting portion connecting to an outer sidewall of the voice coil.

7. The micro-speaker of claim 6, further comprising a frame and a damper, wherein the diaphragm assembly and the damper are connected to the frame, respectively, and the step further comprises a third connecting portion connected to an end of the second connecting portion away from the first connecting portion, and the third connecting portion is connected to the damper.

8. The microspeaker of claim 1 wherein the side of the extension arm remote from the diaphragm assembly is provided with a heat conducting channel.

9. The microspeaker of claim 1 wherein the diaphragm assembly comprises a dome and a diaphragm coupled together, the extension arm being coupled to the dome.