CN212785826U

CN212785826U - Miniature sound generating device

Info

Publication number: CN212785826U
Application number: CN202022075878.5U
Authority: CN
Inventors: 段均钟; 汪珍珍; 孙婷婷
Original assignee: Merry Technology Suzhou Co Ltd
Current assignee: Merry Technology Suzhou Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-03-23
Anticipated expiration: 2030-09-21

Abstract

The utility model discloses a miniature sound generating device, which belongs to the technical field of acoustic equipment and comprises a centering support piece, a vibrating diaphragm and a voice coil, wherein the centering support piece comprises a central part, a cantilever and a fixed part; the central part of the diaphragm is fixed on the top surface of the central part; the voice coil comprises a main body and a lead wire extending out of the main body, and the main body is fixedly connected with the central part; the lead is fixed on the long cantilever. The utility model discloses the bending resistance of long cantilever has been strengthened for long cantilever can have the same vibration range with short cantilever, and the balanced ability that can improve vibration system of the atress of cantilever improves the miniature sound generating mechanism's under the vibrating diaphragm drives audio.

Description

Miniature sound generating device

Technical Field

The utility model relates to an acoustics equipment technical field especially relates to a miniature sound generating mechanism.

Background

The speakers used in the current mobile terminals are mostly micro speakers. The micro speaker includes: magnetic circuit system, vibration system and the basin frame of acceping fixed magnetic circuit system and vibration system.

The vibration system at least comprises a vibrating diaphragm, a centering support and a voice coil. The centering support is used for connecting the vibrating diaphragm and the voice coil into a whole so as to ensure that the voice coil is vertical without deflection, the polarization of the vibrating diaphragm is effectively prevented, and the stability of the centering support can influence the performance of the whole micro-speaker. In the prior art, the outline of the centering branch piece is rectangular, and the centering branch piece includes an inner ring, an outer ring, a long cantilever and a short cantilever connected between the inner ring and the outer ring, the long cantilever is connected with the long side of the inner ring and the long side of the outer ring respectively, the short cantilever is connected with the short side of the inner ring and the short side of the outer ring respectively, and the length of the long cantilever is greater than that of the short cantilever.

The inventor finds that: the long cantilever is longer, so that the bending resistance of the long cantilever is poor, when the micro-speaker works under a high-power working condition, the long cantilever is more prone to vibration of a large amplitude compared with the short cantilever, moreover, a lead connected with a voice coil is fixed on the short cantilever, so that the short cantilever has stronger bending resistance, the difference between the bending resistance of the long cantilever and the bending resistance of the short cantilever is larger, so that the centering support piece is prone to generate pulling force, the vibration system is prone to generating unbalanced condition, and the sound effect of the micro-speaker is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a miniature sound generating mechanism, the balanced performance that can improve vibration system of atress of cantilever to improve miniature sound generating mechanism's under the vibrating diaphragm drives the audio.

As the conception, the utility model adopts the technical proposal that:

a miniature sound generating device comprising:

the centering support piece comprises a central part, a cantilever and a fixing part, wherein one end of the cantilever is connected with the central part, the other end of the cantilever is connected with the fixing part, the cantilever comprises a long cantilever and a short cantilever, and the length of the long cantilever is greater than that of the short cantilever;

the center part of the vibrating diaphragm is fixed on the top surface of the center part;

the voice coil comprises a main body and a lead wire extending out of the main body, and the main body is fixedly connected with the central part;

the lead is fixed on the long cantilever.

Optionally, the number of the leads is the same as that of the long cantilevers, each lead corresponds to each long cantilever one by one, and the leads are fixed on the corresponding long cantilevers respectively.

Optionally, a gap between the central portion and the fixing portion forms an annular hole, the annular hole includes two first channels disposed opposite to each other and two second channels disposed opposite to each other, the long cantilevers, the short cantilevers, and the leads are respectively provided in two numbers, the length of the first channel is greater than that of the second channels, the two long cantilevers are respectively fixed in the two first channels, the two short cantilevers are respectively fixed in the two second channels, and the two leads are respectively fixed on the two long cantilevers.

Optionally, the long cantilever and the short cantilever both include a plurality of layers of base materials, and the number of layers of the base materials in the long cantilever is the same as the number of layers of the base materials in the short cantilever.

Optionally, the number of layers of the base material in the long cantilever and the number of layers of the base material in the short cantilever are both 3.

Optionally, the long cantilever and the short cantilever each comprise two PI layers and an adhesive layer between the two PI layers.

Optionally, the PI layer has a thickness of 25 microns and the adhesive layer has a thickness of 12.5 microns.

Optionally, the thicknesses of the long cantilever and the short cantilever are respectively 25-200 micrometers.

Optionally, one end of the lead is fixedly connected to the main body, the other end of the lead forms an opening with the main body, and the direction of the opening formed by the lead and the main body is in the same direction trend in the clockwise or counterclockwise rotation direction.

Optionally, the lead includes a hook section, the long cantilever having a wide arm and a narrow arm, the hook section being secured to the wide arm.

Optionally, the miniature sound generating device is a speaker, an earphone or a receiver.

The utility model provides a miniature sound generating mechanism includes following beneficial effect at least:

the vibrating diaphragm in the miniature sound production device is arranged on the centering support, and particularly, the central part of the vibrating diaphragm is bonded on the top surface of the central part. When vibration appears in the miniature sound generating device, the vibrating diaphragm can vibrate together with the root of the cantilever, the lead wire is fixed on the long cantilever, the lead wire and the whole of the long cantilever can have larger strength and rigidity, the bending resistance of the long cantilever is enhanced, when the miniature sound generating device works under a high-power working condition, the whole bending resistance of the long cantilever and the lead wire is closer to the bending resistance of the short cantilever, and further the lead wire and the long cantilever can have the same vibration amplitude, the balance performance of a vibration system can be improved due to the balanced stress of the cantilever, the probability of pulling force generated by the centering branch piece is reduced, the vibration system is difficult to generate unbalanced condition, and the sound effect of the miniature sound generating device driven by the vibrating diaphragm is improved.

In addition, the two long cantilevers and the two short cantilevers are stressed in a balanced manner, so that the amplitude of a vibration system can be effectively inhibited, the disconnection is avoided, and the power resistance of the miniature sound production device is effectively improved.

Drawings

Fig. 1 is a schematic structural diagram of a miniature sound generating device provided by an embodiment of the present invention;

fig. 2 is an exploded schematic view of a miniature sound generating device provided by an embodiment of the present invention;

fig. 3 is a top view of a portion of a miniature sound generating device provided by an embodiment of the present invention;

fig. 4 is a top view of a miniature sound generating device provided by an embodiment of the present invention;

fig. 5 is a cross-sectional view a-a of fig. 4 in accordance with the present invention;

figure 6 is an enlarged schematic view of the present invention at position C shown in figure 5;

fig. 7 is a schematic structural diagram of a centering support according to an embodiment of the present invention;

fig. 8 is a sectional view B-B of fig. 7 according to the present invention.

In the figure:

1. vibrating diaphragm; 2. a voice coil; 21. a main body; 22. a lead wire; 221. a hook section; 4. a centering support; 41. A central portion; 411. an annular aperture; 4111. a first channel; 4112. a second channel; 42. a long cantilever; 421. A wide arm section; 422. a narrow arm section; 43. a short cantilever; 431. a PI layer; 432. an adhesive layer; 44. a fixed part; 10. a magnetic circuit system; 20. a vibration system; 30. an opening; 40. a basin stand structure.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment provides a miniature sound generating device, can avoid taking place the unbalanced condition of vibration, has better audio.

As shown in fig. 1 to 8, the miniature sound generating device includes a vibration system 20, a magnetic circuit system 10 and a frame structure 40. The vibration system 20 may include a diaphragm 1, a voice coil 2, and a spider 4.

Wherein, the centering branch 4 includes a central portion 41, a cantilever and a fixing portion 44, wherein one end of the cantilever is connected to the central portion 41, the other end of the cantilever is connected to the fixing portion 44, and the cantilever includes a long cantilever 42 and a short cantilever 43, the length of the long cantilever 42 is greater than that of the short cantilever 43, and one end of the long cantilever 42 is connected to the central portion 41, the other end of the long cantilever 42 is connected to the fixing portion 44, one end of the short cantilever 42 is connected to the central portion 41, and the other end of the short cantilever 42 is connected to the fixing portion 44. The central portion of the diaphragm 1 is fixed on the top surface of the central portion 41, the voice coil 2 includes a main body 21 and a lead 22 extending from the main body, and the main body 21 is fixedly connected to the central portion 41.

As shown in fig. 2, the lead 21 is fixed to the long cantilever 42. Alternatively, the number of the leads 22 may be the same as or different from the number of the long cantilevers 42, for example, the number of the leads 22 may be greater than the number of the long cantilevers 42, in which case, different leads 22 are fixed to each of the long cantilevers 42, or the number of the leads 22 is smaller than the number of the long cantilevers 42, in which case, a part of the leads 22 may be simultaneously located on two or more long cantilevers 42, and the purpose of improving the bending resistance of the long cantilevers 42 may also be achieved, and no lead 22 is fixed to the short cantilever 43.

In this embodiment, at least two long cantilevers 42 are provided, at least two short cantilevers 43 are provided, and the long cantilevers 42 and the short cantilevers are staggered and arranged at intervals. Alternatively, both ends of the long cantilever 42 are fixedly or detachably connected to the central portion 41 and the fixing portion 44, respectively, and similarly, both ends of the short cantilever 43 are fixedly or detachably connected to the central portion 41 and the fixing portion 44, respectively, or the long cantilever 42, the short cantilever 43, the central portion 41 and the fixing portion 44 are integrally formed into a unitary structure, which is the centering sheet or is a part of the centering sheet.

In the miniature sound generating apparatus provided in this embodiment, the diaphragm 1 in the miniature sound generating apparatus is disposed on the centering sheet 4, and specifically, the central portion of the diaphragm 1 is bonded to the top surface of the central portion 41. When vibration appears in the miniature sound generating device, the vibrating diaphragm 1 can vibrate together with the root of the cantilever, through fixing the lead wire 22 on the long cantilever 42, the whole of the lead wire 22 and the long cantilever 42 can have larger hardness, the bending resistance of the long cantilever 42 is enhanced, when the miniature sound generating device works under a high-power working condition, the whole bending resistance of the long cantilever 42 and the lead wire 22 is closer to the bending resistance of the short cantilever 43, and further the lead wire and the long cantilever can have the same vibration amplitude, the balance performance of the vibration system can be improved through the balanced stress of the cantilever, the probability of pulling force generated by the centering disk 4 is reduced, the unbalanced condition of the vibration system is difficult to appear, and the sound effect of the miniature sound generating device driven by the vibrating diaphragm 1 is improved.

Optionally, the number of the leads 22 is the same as that of the long cantilevers 42, each lead 22 corresponds to each long cantilever 42 one by one, and each lead 22 is fixed on its corresponding long cantilever 42, that is, each lead 22 is fixed on only one long cantilever 42, and different leads 22 are fixed on two adjacent long cantilevers 42. In the present embodiment, the number of leads 22, the number of long cantilevers 42, and the number of short cantilevers 43 are all 2.

Further, as shown in fig. 7, a gap between the central portion 41 and the fixing portion 44 forms a circular hole 411, the circular hole 411 may include two oppositely disposed first passages 4111 and two oppositely disposed second passages 4112, but the first passages 4111 extend in a direction different from the direction of the second passages 4112, for example, the first passages 4111 extend in a predetermined direction, the second passages 4112 extend in a direction perpendicular to the predetermined direction, and the length of the first passages 4111 is greater than that of the second passages 4112.

Two long cantilevers 42, two short cantilevers 43 and two leads 22 are respectively disposed, the two long cantilevers 42 are respectively fixed in the two first channels 4111, the two short cantilevers 43 are respectively fixed in the two second channels 4112, and the two leads 22 are respectively fixed on the two long cantilevers 42. The two long cantilevers 42 and the two short cantilevers 43 are stressed in a balanced manner, so that the amplitude of the vibration system 20 can be effectively suppressed, the lead 2 is prevented from being broken, and the power resistance of the miniature sound generating device is effectively improved.

In this embodiment, the central portion 41 and the fixing portion 44 may be rectangular, and the long side of the central portion 41 corresponds to the first channel 4111, and the short side of the central portion 41 corresponds to the second channel 4112.

Optionally, referring to fig. 3, one end of the lead 22 is fixedly connected to the main body 21, the other end of the lead 22 forms an opening 30 with the main body 21, and the direction of the opening 30 formed by each lead 22 and the main body 21 is in the same direction trend in the clockwise or counterclockwise rotation direction, so that the weight distribution of the miniature sound generating device is more uniform, and the balance of the vibration system 20 is further improved. For example, the two leads 22 may be arranged in a central symmetry.

Further, one end of the lead 22 may be led out from a corner of the main body 21 as a lead 22 located at a lower side in fig. 3, or one end of the lead 22 may be led out from a middle portion of the main body 21 as a lead located at an upper side in fig. 3.

As shown in fig. 3, the lead 22 includes a hook section 221, the hook section 221 is fixedly connected to the main body 21, as shown in fig. 7, the long cantilever 42 has a wide arm 421 and a narrow arm 422, and the hook section 221 is fixed to the wide arm 421, so that the long cantilever 42 can better support the lead 22.

Alternatively, both the long and

short cantilevers

42, 43 may comprise multiple layers of substrate material, with the number of layers of substrate material in the long cantilever 42 being the same as the number of layers of substrate material in the short cantilever 43. For example, as shown in fig. 8, the number of layers of the substrate in the long cantilever 42 and the number of layers of the substrate in the short cantilever 43 are both 3, that is, the long cantilever 42 includes three layers of the substrate, the short cantilever 43 also includes three layers of the substrate, and the thickness of the long cantilever 42 and the thickness of the short cantilever 43 may be the same.

In this embodiment, as shown in fig. 8, each of the long cantilever 42 and the short cantilever 43 includes two Polyimide (PI) layers 431 and an adhesive layer 432 between the two PI layers 431. The thickness of the adhesive layer 432 can be adjusted according to actual needs, so as to optimize the stability of the miniature sound generating device.

Optionally, the thickness of the PI layer 431 is 12.5-50 micrometers, and preferably, the thickness of the PI layer 431 is 25 micrometers; the thickness of the adhesive layer 432 is 12.5-50 microns, and preferably, the thickness of the adhesive layer 432 is 12.5 microns.

In this embodiment, the thickness of the long cantilever 42 is 25 to 200 microns, the thickness of the short cantilever 43 is 25 to 200 microns, and the thickness of the support plate 41 is 25 to 200 microns.

Alternatively, as shown in fig. 2 or fig. 5, the miniature sound generating device includes, from top to bottom, a diaphragm 1, a centering pad 4, a voice coil 2, and a frame structure 40. The magnetic circuit system 10 is fixed on the basin stand structure 40.

In addition, the miniature sound generating device in this embodiment may be an electronic product such as a speaker, an earphone, or a receiver.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A miniature sound generating apparatus, comprising:

the centering support piece (4) comprises a central part (41), a cantilever and a fixing part (44), one end of the cantilever is connected with the central part (41), the other end of the cantilever is connected with the fixing part (44), the cantilever comprises a long cantilever (42) and a short cantilever (43), and the length of the long cantilever (42) is greater than that of the short cantilever (43);

a diaphragm (1), a central portion of the diaphragm (1) being fixed to a top surface of the central portion (41);

the voice coil (2), the said voice coil (2) includes the body (21) and lead wire (22) extending from body, the said body (21) and said central part (41) are fixedly connected;

the lead (22) is fixed to the long cantilever (42).

2. The miniature sound generating apparatus according to claim 1, wherein the number of said leads (22) is the same as the number of said long cantilevers (42), each of said leads (22) is in one-to-one correspondence with each of said long cantilevers (42), and said leads (22) are respectively fixed to said long cantilevers (42) corresponding thereto.

3. The miniature sound generating apparatus according to claim 1, wherein the gap between the central portion (41) and the fixing portion (44) forms a circular hole (411), the circular hole (411) comprises two first oppositely disposed channels (4111) and two second oppositely disposed channels (4112), the long cantilevers (42), the short cantilevers (43) and the leads (22) are respectively provided in two numbers, the length of the first channel (4111) is greater than that of the second channel (4112), the two long cantilevers (42) are respectively fixed in the two first channels (4111), the two short cantilevers (43) are respectively fixed in the two second channels (4112), and the two leads (22) are respectively fixed on the two long cantilevers (42).

4. The miniature sound production device of claim 1, wherein the long cantilever (42) and the short cantilever (43) each comprise a multi-layer substrate, and wherein the number of layers of the substrate in the long cantilever (42) is the same as the number of layers of the substrate in the short cantilever (43).

5. The miniature sound production device of claim 4, wherein the number of layers of substrate material in the long cantilever (42) and the number of layers of substrate material in the short cantilever (43) are both 3.

6. The miniature sound generating device of claim 5, wherein said long cantilever (42) and said short cantilever (43) each comprise two layers of PI (431) and a layer of adhesive (432) between said two layers of PI (431).

7. The miniature sound generating device according to claim 6, wherein the thickness of the PI layer (431) is 12.5-50 micrometers, and the thickness of the adhesive layer (432) is 12.5-50 micrometers.

8. The miniature sound generating device according to any of claims 1-7, wherein said long cantilever (42) and said short cantilever (43) each have a thickness of 25-200 μm.

9. The miniature sound generating device according to any of claims 1-7, wherein one end of said leads (22) is fixedly connected to said main body (21), the other end of said leads (22) forms an opening (30) with said main body (21), and the orientation of each of said leads (22) and said opening (30) formed by said main body (21) is in the same direction in clockwise or counterclockwise rotation.

10. The miniature sound generating apparatus according to any of claims 1-7, wherein said lead wire (22) comprises a hooked section (221), said elongated cantilever (42) having a wide arm portion (421) and a narrow arm portion (422), said hooked section (221) being fixed to said wide arm portion (421).

11. The miniature sound generating apparatus of any of claims 1-7, wherein said miniature sound generating apparatus is a speaker, an earphone or a receiver.