CN217240919U

CN217240919U - Vibrating diaphragm, sound production device and electronic equipment

Info

Publication number: CN217240919U
Application number: CN202221055192.2U
Authority: CN
Inventors: 黄晓松; 徐志刚; 唐长超
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-19
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses a vibrating diaphragm, sound generating mechanism and electronic equipment, the vibrating diaphragm has end to end's major axis limit and minor axis limit, the length ratio of major axis limit and minor axis limit is more than or equal to 2; the diaphragm comprises a central part, a corrugated ring part arranged around the central part and a fixing part connected to the outer side of the corrugated ring part; the edge folding part comprises a first section and a second section, wherein the first section extends along the direction of the long axis edge, the second section extends along the direction of the short axis edge, and the extension length a of the first section along the short axis edge is smaller than the extension length b of the second section along the long axis edge. The utility model aims at providing an effectively reduce the antiphase vibration, improve the vibrating diaphragm of high frequency response, during sound generating mechanism was applied to this vibrating diaphragm, it was higher to reduce the THD distortion, promoted the audio effect.

Description

Vibrating diaphragm, sound production device and electronic equipment

Technical Field

The utility model relates to an electroacoustic conversion technical field, in particular to vibrating diaphragm and sound generating mechanism and electronic equipment who uses this vibrating diaphragm.

Background

As an electroacoustic device for converting an electrical signal into an acoustic signal, a speaker is widely used in terminal devices such as mobile phones and personal computers. The loudspeaker structure usually includes magnetic circuit system, vibration system and auxiliary system, and the vibrating diaphragm is as the component of vibration system, is the important part that realizes the electroacoustic energy conversion, and the quality of its performance directly influences the sound effect of product.

In the correlation technique, along with the rapid development of electronic products, also put forward higher requirement to the speaker, the speaker needs more adaptation in the complete machine, and then has the narrower, longer demand of requirement speaker appearance, and such speaker structure then can lead to the length of vibrating diaphragm, wide size proportion is great, make the speaker structure have great antiphase vibration, it is relatively poor to lead to the high-frequency response, and the vibrating diaphragm is the shrink deflection aggravation in vibration process, thereby it is higher to lead to product THD distortion, the audio frequency effect is relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a vibrating diaphragm, sound generating mechanism and electronic equipment, aim at providing one kind and effectively reduce the antiphase vibration, improve the vibrating diaphragm of high-frequency response, and this vibrating diaphragm can reduce the THD distortion higher in being applied to sound generating mechanism, promotes the audio frequency effect.

In order to achieve the above object, the present invention provides a diaphragm for a sound generating device, wherein the diaphragm has a long axis side and a short axis side connected end to end, and a length ratio of the long axis side to the short axis side is greater than or equal to 2;

the diaphragm comprises a central part, a corrugated ring part arranged around the central part and a fixing part connected to the outer side of the corrugated ring part;

the folded ring part comprises a first section and a second section, wherein the first section extends along the direction of the long shaft side, the second section extends along the direction of the short shaft side, and the extension length a of the first section along the short shaft side is smaller than the extension length b of the second section along the long shaft side.

In one embodiment, along the extension direction of the long axis side, the extension lengths a of the first segments along the short axis side are the same;

and/or the extension lengths b of the second sections along the long axis side are the same along the extension direction of the short axis side.

In one embodiment, the ratio of the extension length b of the second segment along the long axis side to the extension length a of the first segment along the short axis side is in a range of 1-3.

In one embodiment, the ratio of the extension length b of the second section along the long axis side to the length L1 of the long axis side is in the range of 0.04-0.15;

and/or the ratio of the extension length a of the first section along the short axis side to the length L2 of the short axis side ranges from 0.05 to 0.22.

In an embodiment, the central portion is provided with a hollow portion and a connecting portion, and two ends of the connecting portion are connected to two opposite sides of the hollow portion corresponding to the long axis side, so as to divide the hollow portion into hollow holes arranged at intervals.

In one embodiment, the length of the long axis side is defined as L1, the length of the short axis side is defined as L2, the vertical projection area of the hollow holes is defined as S1, the number of the hollow holes is defined as N, and N is greater than or equal to 2; wherein, (N S1)/(L1L 2) is not less than 0.27.

In one embodiment, the ratio of the extension length d1 of the connecting part along the long axis side direction to the length L1 of the long axis side is in the range of 0.04-0.8;

and/or the ratio of the extension length d2 of the connecting part along the direction of the short shaft side to the length L2 of the short shaft side ranges from 0.05 to 0.8.

In one embodiment, the connecting portion includes a plurality of connecting portions, and the plurality of connecting portions are arranged at intervals.

In one embodiment, the plurality of connecting parts are arranged at intervals along the extension direction of the long axis side;

and/or the connecting parts are symmetrically arranged along the central axis of the hollow part.

In one embodiment, the ratio of the lengths of the long axis side and the short axis side is less than or equal to 3.5.

In one embodiment, the young's modulus of the diaphragm ranges from 20MP to 350 MP;

and/or the tensile strength range of the diaphragm is 30 MP-100 MP.

The utility model discloses still provide a sound generating mechanism, sound generating mechanism includes:

a housing;

the magnetic circuit system is connected to the shell and provided with a magnetic gap; and

the vibration system comprises a vibrating diaphragm component and a voice coil, one end of the voice coil is connected with the vibrating diaphragm component, the other end of the voice coil is suspended in the magnetic gap, the vibrating diaphragm component comprises the vibrating diaphragm and a ball top connected with the central part of the vibrating diaphragm, and the vibrating diaphragm is connected with the shell and is opposite to the magnetic circuit system.

In an embodiment, a portion between an outer edge of the dome and an outer peripheral wall of the voice coil forms a cantilever portion, the cantilever portion includes a first cantilever extending along a long-axis side direction of the diaphragm and a second cantilever extending along a short-axis side direction of the diaphragm, an extension length D1 of the first cantilever along the short-axis side is smaller than an extension length D2 of the second cantilever along the long-axis side, where D2 is not greater than 3mm, an extension length of the dome along the long-axis side is W1, and an extension length D2 of the second cantilever along the long-axis side satisfies: d2/W1 is more than or equal to 0.05 and less than or equal to 0.1.

In one embodiment, the extension length D2 of the second cantilever is more than or equal to 2 mm.

In one embodiment, the extension of the dome along the minor axis is W2, and the extension of the first suspension arm along the minor axis D1 satisfies: D1/W2 is more than or equal to 0.05 and less than or equal to 0.1.

In one embodiment, the ratio of the extension length D1 of the first cantilever arm along the short axis side to the length L2 of the short axis side is less than 0.05;

and/or the ratio of the extension length D2 of the second cantilever along the long axis side to the length L1 of the long axis side is less than 0.05.

In one embodiment, the vertical projection area of the top dome is defined as S2, and the vertical projection area of the cantilever part is defined as S3;

wherein S3/S2 is less than or equal to 0.3.

The utility model also provides an electronic equipment, including equipment housing and the aforesaid sound generating mechanism, sound generating mechanism locates equipment housing.

The utility model discloses technical scheme's vibrating diaphragm has end to end's major axis limit and minor axis limit, through set up the vibrating diaphragm to central part, encircle the book ring portion that central part set up and connect in the fixed part in a ring portion outside for book ring portion includes the first section that extends along major axis limit direction and the second section that extends along minor axis limit direction, is less than the second section through setting up the extension length an on first section along the minor axis limit and follows the extension length b on major axis limit, so under the length ratio on major axis limit and the minor axis limit of vibrating diaphragm is greater than or equal to 2, utilize the width of book ring portion to set up to inequality, in order to reach and reduce anti-phase vibration, improve high frequency response effect, promote sound generating mechanism's sound production effect; simultaneously, the width of the bending ring part is set to be unequal, the smoothness that the opposite sides of the vibrating diaphragm are inconsistent can be obtained, the asymmetry of the shell structures of a plurality of current sound generating devices is matched, and therefore the balance of the whole system is finally achieved, the vibrating diaphragm can have lower deformation in the vibrating process, the product state is guaranteed, and THD distortion is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a diaphragm in an embodiment of the present invention;

fig. 2 is a schematic structural view of a diaphragm according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a diaphragm according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention;

fig. 5 is an exploded view of the sound generating device according to an embodiment of the present invention;

fig. 6 is a schematic sectional view of the sounding device along the long axis in an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of the sound generating device along the short axis in an embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

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.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.

Furthermore, descriptions in the present application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Based on the above concept and problem, the utility model provides a vibrating diaphragm 311, this vibrating diaphragm 311 is applied to sound generating mechanism 100. It is understood that the sound generating apparatus 100 can be applied to electronic devices such as a sound box, an earphone, a mobile phone, and the like, and is not limited herein.

Referring to fig. 1 to 7, in the embodiment of the present invention, the diaphragm 311 has a long axis side 3113a and a short axis side 3113b connected end to end, and a length ratio of the long axis side 3113a to the short axis side 3113b is greater than or equal to 2; the diaphragm 311 includes a central portion 3111, a bent portion 3112 surrounding the central portion 3111, and a fixing portion 3113 connected to an outer side of the bent portion 3112; the edge 3112 includes a first segment 3112a extending along the long axis 3113a and a second segment 3112b extending along the short axis 3113b, and a length a of the first segment 3112a along the short axis 3113b is smaller than a length b of the second segment 3112b along the long axis 3113 a.

In this embodiment, as shown in fig. 1 to 7, the central portion 3111, the corrugated portion 3112 and the fixing portion 3113 of the diaphragm 311 are integrally formed. The bent portion 3112 is disposed around the central portion 3111 and between the central portion 3111 and the fixing portion 3113, and the bent portion 3112 may be a convex structure upward or downward. The diaphragm 311 is connected and fixed to the housing 1 of the sound generating apparatus 100 through the fixing portion 3113, so as to improve the connection stability and the sealing property between the housing 1 and the diaphragm 311.

In order to increase the effective vibration area of the diaphragm 311, the fixing portion 3113 may be formed by extending the outer side of the edge portion 3112 downward or upward, so that the fixing portion 3113 is connected and fixed with the inner side wall or the outer side wall of the housing 1.

In one embodiment of the present application, the diaphragm 311 is rectangular, and the diaphragm 311 has a long axis side 3113a and a short axis side 3113b connected end to end, that is, the diaphragm 311 has two long axis sides 3113a and two short axis sides 3113b opposite to each other, two ends of the short axis side 3113b are respectively connected to the two long axis sides 3113a, and two ends of the long axis side 3113a are respectively connected to the two short axis sides 3113 b. It is understood that the outer periphery of the fixing portion 3113 of the diaphragm 311 includes a long axis side 3113a and a short axis side 3113b connected end to end.

It is understood that the ratio of the length of the long axis side 3113a to the short axis side 3113b of the diaphragm 311 is greater than or equal to 2, that is, the ratio of the length of the long axis side 3113a to the length of the short axis side 3113b of the diaphragm 311 is not less than 2. In this case, the ratio of the long axis side 3113a and the short axis side 3113b of the diaphragm 311 is large, so that the diaphragm 311 is applied to the sound generating apparatus 100, so that the sound generating apparatus 100 has large anti-phase vibration, resulting in poor high frequency response, and the diaphragm 311 is likely to contract and deform in the vibration process, resulting in high THD distortion and poor audio effect of the sound generating apparatus 100.

Optionally, a length ratio of the long axis side 3113a to the short axis side 3113b of the diaphragm 311 is less than or equal to 3.5. In this embodiment, the length ratio of the long axis side 3113a to the short axis side 3113b of the diaphragm 311 is in a range of 2-3.5, so as to ensure the vibration effect of the diaphragm 311, thereby ensuring the sound-producing effect of the sound-producing device 100.

In this embodiment, the edge 3112 of the diaphragm 311 is configured as a first segment 3112a and a second segment 3112b connected end to end, so that the first segment 3112a extends along the long axis edge 3113a, the second segment 3112b extends along the short axis edge 3113b, and the extending length a of the first segment 3112a along the short axis edge 3113b is smaller than the extending length b of the second segment 3112b along the long axis edge 3113a, that is, the width of the edge 3112 is set to be unequal, so as to obtain the compliance of the opposite sides of the diaphragm 311, and match the asymmetry of the housing structures of many current sound generators 100, so as to finally achieve the balance of the whole system.

It is understood that the width of the first segment 3112a is the extension a of the first segment 3112a along the minor axis edge 3113b and the width of the second segment 3112b is the extension b of the second segment 3112b along the major axis edge 3113 a. In this embodiment, along the extension direction of the major axis side 3113a, the extension length a of the first section 3112a along the minor axis side 3113b is the same, that is, along the major axis side 3113a, the width of the first section 3112a is the same. The second segment 3112b has the same length b along the major axis side 3113a in the direction of extension of the minor axis side 3113b, that is, the width of the second segment 3112b is the same along the minor axis side 3113 b. Of course, in other embodiments, the width of the first section 3112a along the long axis side 3113a may be set differently; the width of the second segment 3112b along the minor axis edge 3113b may be different, and is not limited herein.

The utility model discloses a vibrating diaphragm 311 has major axis limit 3113a and minor axis limit 3113b end to end, through setting up vibrating diaphragm 311 to central part 3111, encircle the hem 3112 that central part 3111 set up and connect in the fixed part 3113 of hem 3112 outside, make hem 3112 include along the first section 3112a of major axis limit 3113a direction extension and along the second section 3112b of minor axis limit 3113b direction extension, through setting up the extension length a of first section 3112a along minor axis limit 3113b and be less than the extension length b of second section 3112b along major axis limit 3113a, so under the condition that the length ratio of major axis limit 3113a and minor axis limit 3113b of vibrating diaphragm 311 is greater than or equal to 2, utilize the width setting of hem 3112 to set up inequality, in order to reduce anti-phase vibration, improve the high frequency response effect, promote the vocal effect of sound generating mechanism 100; meanwhile, the width of the bending ring portion 3112 is set to be unequal, and the compliance of the vibrating diaphragm 311 with the contralateral inconsistency can be obtained, and the asymmetry of the shell structures of many current sound generating apparatuses 100 is matched, so that the balance of the whole system is finally achieved, the vibrating diaphragm 311 can have a lower deformation amount in the vibration process, the product state is ensured, and the THD distortion is improved.

In one embodiment, the ratio of the length b of the second section 3112b along the major axis side 3113a to the length a of the first section 3112a along the minor axis side 3113b is in a range of 1-3.

In this embodiment, the ratio of the width of the second segment 3112b to the width of the first segment 3112a is adjusted and controlled to be 1-3, so as to ensure the overall vibration performance of the diaphragm 311 and improve the high-frequency performance, i.e., the ratio of the extension length b of the second segment 3112b along the long axis edge 3113a to the extension length a of the first segment 3112a along the short axis edge 3113b is 1-3.

Optionally, the ratio of the extension length b of the second segment 3112b along the major axis edge 3113a to the extension length a of the first segment 3112a along the minor axis edge 3113b is 1, 1.5, 2, 3.5, 3, etc., and is not limited herein.

In one embodiment, the ratio of the extension b of the second section 3112b along the long side 3113a to the length L1 of the long side 3113a is 0.04-0.15. It will be appreciated that by adjusting and controlling the ratio of the width of the second section 3112b to the length L1 of the long side 3113a to be in the range of 0.04 to 0.15, the vibration performance of the diaphragm 311 at the short side 3113b is ensured, i.e., the ratio of the extension b of the second section 3112b along the long side 3113a to the length L1 of the long side 3113a is in the range of 0.04 to 0.15.

Alternatively, the ratio of the extension length b of the second section 3112b along the long axis side 3113a to the length L1 of the long axis side 3113a is 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, etc., and is not limited herein.

In one embodiment, the ratio of the length a of the first segment 3112a along the minor axis edge 3113b to the length L2 of the minor axis edge 3113b is in a range of 0.05-0.22. It can be understood that the ratio of the width of the first segment 3112a to the length L2 of the short-axis side 3113b is adjusted and controlled to be 0.05-0.22, so as to ensure the vibration performance of the diaphragm 311 at the long-axis side 3113a, i.e. the ratio of the extension length a of the first segment 3112a along the short-axis side 3113b to the length L2 of the short-axis side 3113b is 0.05-0.22.

Alternatively, the ratio of the extension a of the first segment 3112a along the minor axis edge 3113b to the length L2 of the minor axis edge 3113b is 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.21, 0.22, etc., and is not limited herein.

In one embodiment, the central portion 3111 is provided with a hollow portion 3111a and a connecting portion 3111c, and two ends of the connecting portion 3111c are connected to two opposite sides of the hollow portion 3111a corresponding to the long axis side 3113a, so as to divide the hollow portion 3111a into hollow holes 3111b arranged at intervals.

In this embodiment, the hollow portion 3111a is disposed in the central portion 3111, an inner ring structure is formed between an inner wall of the hollow portion 3111a and the ring-folded portion 3112, the connecting portion 3111c is disposed corresponding to the hollow portion 3111a, and two ends of the connecting portion 3111c are connected to two sides of the inner ring structure corresponding to the long axis edge 3113a, so as to divide the hollow portion 3111a into hollow holes 3111b disposed at intervals.

It is understood that the ratio of the length of the long axis side 3113a to the short axis side 3113b of the diaphragm 311 is greater than or equal to 2, that is, the ratio of the length of the long axis side 3113a to the length of the short axis side 3113b of the diaphragm 311 is not less than 2. In this case, the ratio of the long axis side 3113a to the short axis side 3113b of the diaphragm 311 is large, so that when the diaphragm 311 is applied to the sound generating apparatus 100, the diaphragm 311 may contract and deform in a vibration process, and thus the THD distortion of the sound generating apparatus 100 is high, and the audio effect is poor.

In this embodiment, by providing the hollow portion 3111a in the central portion 3111 of the diaphragm 311, the overall weight of the diaphragm 311 can be effectively reduced. Optionally, a hollow portion 3111a is disposed at a central position of the central portion 3111, and the hollow portion 3111a may be a through hole, a hollow hole, or an opening. In order to enhance the structural strength of the diaphragm 311 and avoid the diaphragm 311 from shrinking and deforming in the vibration process, the diaphragm 311 is further provided with a connection portion 3111c, the connection portion 3111c is located at the hollow portion 3111a, and two ends of the connection portion 3111c are connected to two opposite sides of the hollow portion 3111a corresponding to the long axis edge 3113a, so as to divide the hollow portion 3111a into hollow holes 3111b arranged at intervals. So can utilize connecting portion 3111c to strengthen the structural strength of vibrating diaphragm 311 on major axis limit 3113a, avoid vibrating diaphragm 311 to take place shrink deflection aggravation on major axis limit 3113a in the vibration process simultaneously to it is higher to reduce sound generating mechanism 100's THD distortion, promotes the audio frequency effect.

The utility model discloses a set up fretwork portion 3111a on vibrating diaphragm 311 to reduce the weight of vibrating diaphragm 311, improve the high frequency sensitivity of vibrating diaphragm 311; meanwhile, by providing the connection portion 3111c, two ends of the connection portion 3111c are connected to two opposite sides of the hollow portion 3111a corresponding to the long axis side 3113a, so as to divide the hollow portion 3111a into separately arranged hollow holes 3111b, and thus, under the condition that the length ratio of the long axis side 3113a to the short axis side 3113b of the diaphragm 311 is greater than or equal to 2, the connection portion 3111c is used to ensure that the low-modulus diaphragm 311 can have a lower deformation amount during vibration, thereby ensuring a product state and improving THD distortion.

In one embodiment, the length of the long axis side 3113a is defined as L1, the length of the short axis side 3113b is defined as L2, the vertical projection area of the hollow-out holes 3111b is defined as S1, the number of the hollow-out holes 3111b is defined as N, N is greater than or equal to 2; wherein, N S1/L1L 2 is not less than 0.27.

In this embodiment, as shown in fig. 1 to fig. 3, by controlling and adjusting the range of the ratio between the sum of the areas of all the hollow holes 3111b and the area of the diaphragm 311 to be greater than or equal to 0.27, the structural strength of the diaphragm 311 is ensured under the condition of reducing the weight of the diaphragm 311, so as to ensure the vibration performance of the diaphragm 311. Optionally, (N S)/(L1L 2). ltoreq.0.75.

It can be understood that when the connecting portions 3111c of the hollow portion 3111a are W, and W is greater than or equal to 1, the hollow portion 3111a forms the hollow holes 3111b, and N is W + 1. In one embodiment, the connection portion 3111c includes a plurality of connection portions 3111c arranged at intervals. Alternatively, the connection portion 3111c includes two, three, four, five or more, etc.

Optionally, the connecting portions 3111c are arranged at intervals along the extending direction of the long-axis side 3113a, so that the structural strength and lower deformation of the diaphragm 311 along the long-axis side 3113a can be effectively ensured. Optionally, the connecting portions 3111c are symmetrically disposed about the central axis of the hollow portion 3111a, so that the structural strength of the diaphragm 311 along the long axis side 3113a is uniform, and the deformation amount is more uniform.

In this embodiment, the number of the hollow-out holes 3111b is defined as N, N is greater than or equal to 2, the vertical projection area of the hollow-out holes 3111b is defined as S, the total area of all the hollow-out holes 3111b is N × S, and the area of the diaphragm 311 is the product of the length L1 of the long-axis side 3113a and the length L2 of the short-axis side 3113 b.

Optionally, the ratio of the sum of the areas of all the hollow holes 3111b to the area of the diaphragm 311 is 0.27, 0.3, 0.4, 0.5, and the like, which is not limited herein.

In one embodiment, the ratio of the extension length d1 of the connecting portion 3111c along the long axis side 3113a to the length L1 of the long axis side 3113a is 0.04-0.8.

It can be understood that, as shown in fig. 1 to fig. 3, by controlling and adjusting the ratio of the extension length d1 of the connecting portion 3111c along the long axis side 3113a to the length L1 of the long axis side 3113a to be in the range of 0.04 to 0.8, the diaphragm 311 can not only reduce the weight of the diaphragm 311, but also ensure the vibration effect of the diaphragm 311.

In the present embodiment, when the connecting portion 3111c includes a plurality of connecting portions 3111c, d1 is the sum of the lengths of the connecting portions 3111c along the long axis side 3113a, that is, the ratio of the sum d1 of the lengths of the connecting portions 3111c along the long axis side 3113a to the length L1 of the long axis side 3113a is in the range of 0.04 to 0.8.

Alternatively, the ratio of the extension length d1 of the connecting portion 3111c in the direction of the long axis side 3113a to the length L1 of the long axis side 3113a is 0.04, 0.05, 0.06, 0.07, 0.8, etc., and is not limited herein.

In one embodiment, the ratio of the extension d2 of the connecting portion 3111c along the short axis side 3113b to the length L2 of the short axis side 3113b is 0.05-0.8.

It can be understood that, as shown in fig. 1 to fig. 3, by controlling and adjusting the ratio of the extension length d2 of the connecting portion 3111c along the direction of the short axis side 3113b to the length L2 of the short axis side 3113b to be in the range of 0.05-0.8, the diaphragm 311 can not only reduce the weight of the diaphragm 311, but also ensure the vibration effect of the diaphragm 311.

In this embodiment, d2 is the distance between two opposite sides of the connecting portion 3111c connected to the hollow portion 3111a corresponding to the long axis side 3113 a. Alternatively, the connection portion 3111c is parallel to the minor axis edge 3113 b. The connection portion 3111c is perpendicular to the long-axis side 3113 a.

Alternatively, the ratio of the extension length d2 of the connecting portion 3111c in the direction of the minor axis side 3113b to the length L2 of the minor axis side 3113b is 0.05, 0.1, 0.2, 0.3, 0.4, 0.8, etc., and is not limited herein.

In one embodiment, the Young's modulus of the diaphragm 311 is in a range of 20MP to 350 MP. It is understood that such an arrangement is effective to ensure low-frequency performance of the diaphragm 311. Optionally, the young's modulus of the diaphragm 311 is 20MP, 50MP, 80MP, 100MP, 130MP, 150MP, 180MP, 200MP, 230MP, 250MP, 280MP, 300MP, 330MP, 350MP, etc., which is not limited herein.

In one embodiment, the tensile strength of the diaphragm 311 is in a range of 30MP to 100 MP. It is understood that such an arrangement is effective to ensure the vibration performance of the diaphragm 311. Optionally, the tensile strength of the diaphragm 311 is 30MP, 40MP, 50MP, 60MP, 70MP, 80MP, 90MP, 100MP, and the like, which is not limited herein.

It can be understood that, since the diaphragm 311 has a relatively small stiffness, the low-frequency performance of the sound generating apparatus 100 can be improved. However, in the case that the ratio of the lengths of the long axis side 3113a and the short axis side 3113b of the diaphragm 311 is greater than or equal to 2, the shrinkage deformation of the diaphragm 311 is increased during the vibration process, which results in high THD distortion of the product and poor audio effect. The utility model discloses a fretwork portion 3111a at vibrating diaphragm 311 sets up connecting portion 3111c to utilize connecting portion 3111c to guarantee that low modulus vibrating diaphragm 311 can have lower deformation volume in vibration process, thereby guarantee the product state, improve the THD distortion.

As shown in fig. 4 to fig. 7, the utility model discloses still provide a sound generating mechanism 100, this sound generating mechanism 100 includes foretell vibrating diaphragm 311, and the concrete structure of this vibrating diaphragm 311 refers to aforementioned embodiment, because this vibrating diaphragm 311 has adopted whole technical scheme of aforementioned all embodiments, consequently has all beneficial effects that the technical scheme of aforementioned embodiment brought at least, and the repeated description is no longer given here.

In this embodiment, the sound generating apparatus 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3, wherein the magnetic circuit system 2 is connected to the housing 1, the magnetic circuit system 2 is provided with a magnetic gap 21, the vibration system 3 includes a diaphragm assembly 31 and a voice coil 32, one end of the voice coil 32 is connected to the diaphragm assembly 31, the other end of the voice coil 32 is suspended in the magnetic gap 21, the diaphragm assembly 31 includes the above-mentioned diaphragm 311 and a dome 312 connected to a central portion 3111 of the diaphragm 311, and the diaphragm 311 is connected to the housing 1 and is opposite to the magnetic circuit system 2.

In this embodiment, the sound generating apparatus 100 includes a housing 1, a magnetic circuit system 2 and a vibration system 3, wherein the magnetic circuit system 2 is connected to the housing 1, the magnetic circuit system 2 is provided with a magnetic gap 21, the vibration system 3 includes a diaphragm assembly 31 and a voice coil 32, one end of the voice coil 32 is connected to the diaphragm assembly 31, the other end of the voice coil 32 is suspended in the magnetic gap 21, the diaphragm assembly 31 includes the above-mentioned diaphragm 311 and a dome 312 connected to the middle of the diaphragm 311, the diaphragm 311 is connected to the housing 1 and is opposite to the magnetic circuit system 2.

In the present embodiment, the housing 1 is used for mounting, fixing, supporting and protecting the components of the vibration system 3, the magnetic circuit system 2, and the like, that is, the housing 1 provides a mounting base for the components of the vibration system 3, the magnetic circuit system 2, and the like. It is understood that the housing 1 may be a mounting shell, a housing, or a box with a mounting cavity, that is, the housing 1 defines a receiving space, which is not limited herein.

Alternatively, the housing 1 has a rectangular structure, and the housing 1 has long sides and short sides corresponding to the long-axis side 3113a and the short-axis side 3113b of the diaphragm 311. It can be understood that the housing 1 has two opposite long sides and two short sides, two ends of the short sides are respectively connected with the two long sides, and two ends of the long sides are respectively connected with the two short sides, so that the housing 1 defines a receiving space.

It can be understood that, when the housing 1 is a metal part, the magnetic circuit system 2 and the housing 1 are fixed by bonding or welding. In another embodiment, when the housing 1 is formed by plastic injection molding, the side magnetic conductive plate of the magnetic circuit system 2 is first injection molded in the housing 1 as an insert, or the magnetic circuit system 2 and the housing 1 are fixed by adhesion, and then the other parts are fixed by adhesion, which is not limited herein.

In the present embodiment, the magnetic circuit system 2 is disposed in the housing space and connected to the case 1. Magnetic circuit 2 is provided with magnetic gap 21, vibration system 3 includes vibrating diaphragm subassembly 31 and connects in the voice coil loudspeaker voice coil 32 of vibrating diaphragm subassembly 31, the one end and the vibrating diaphragm subassembly 31 of voice coil loudspeaker voice coil 32 are connected, the other end of voice coil loudspeaker voice coil 32 hangs and locates in magnetic gap 21, so make voice coil loudspeaker voice coil 32 and external circuit switch on, utilize voice coil loudspeaker voice coil 32 to transmit electric energy to magnetic circuit 2's magnetic gap 21, make the magnetic field that magnetic circuit 2 produced convert the electric energy into mechanical energy, thereby make voice coil loudspeaker voice coil 32 take place the vibration, and drive vibrating diaphragm 311 realization vibration sound production of vibrating diaphragm subassembly 31, further convert mechanical energy into acoustic energy. That is, after the voice coil 32 disposed in the magnetic gap 21 receives the externally varying alternating current signal, the voice coil makes a reciprocating motion of cutting the magnetic lines of force under the driving of the magnetic field force of the magnetic circuit system 2, so as to drive the diaphragm 311 of the vibration system 3 to vibrate and generate sound.

It is understood that the diaphragm assembly 31 includes a diaphragm 311 and a dome 312 connected to a central portion of the diaphragm 311. In this embodiment, the dome 312 is connected to the central portion 3111 of the diaphragm 311. The dome 312 may be disposed on a side of the diaphragm 311 facing the voice coil 32, that is, the dome 312 is disposed between the diaphragm 311 and the voice coil 32. Of course, the ball top 312 may also be disposed on a side of the diaphragm 311 opposite to the voice coil 32, that is, the voice coil 32 is connected to the diaphragm 311. By providing the dome 312 at the center of the diaphragm 311, the structural strength of the diaphragm 311 can be strengthened by the dome 312.

In this embodiment, the outer periphery of the diaphragm 311 of the diaphragm assembly 31 is connected to the housing 1, that is, the fixing portion 3113 of the diaphragm 311 is connected to the housing 1, so that the diaphragm 311, the housing 1 and the magnetic circuit system 2 enclose to form an acoustic cavity. The dome 312 is connected to the central portion 3111 and the connection portion 3111c of the diaphragm 311, and covers the hollow hole 3111 b.

In one embodiment, a portion between an outer edge of the dome 312 and an outer peripheral wall of the voice coil 32 forms a cantilever portion, the cantilever portion includes a first cantilever 3121 extending along a long-axis side 3113a of the diaphragm 311 and a second cantilever 3122 extending along a short-axis side 3113b of the diaphragm 311, an extension D1 of the first cantilever 3121 along the short-axis side 3113b is less than an extension D2 of the second cantilever 3122 along the long-axis side 3113a, D2 is no greater than 3mm, an extension of the dome 312 along the long-axis side 3113a is W1, and an extension D2 of the second cantilever 3122 along the long-axis side 3113a satisfies: d2/W1 is more than or equal to 0.05 and less than or equal to 0.1. For example, d2/W1 can be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, and the like.

It can be understood that, under the condition that the length ratio of the long axis side 3113a to the short axis side 3113b of the diaphragm 311 is not less than 2, when the diaphragm 311 is driven by the voice coil 32 to vibrate, the diaphragm 311 may have large anti-phase vibration, so that the high frequency response is poor.

In the present embodiment, as shown in fig. 6 and 7, a cantilever portion is formed by providing a portion between the outer edge of the dome 312 and the outer peripheral wall of the voice coil 32, and the cantilever portion includes a first cantilever 3121 extending in the direction of the major axis side 3113a and a second cantilever 3122 extending in the direction of the minor axis side 3113b, so that the extension length D1 of the first cantilever 3121 along the minor axis side 3113b is smaller than the extension length D2 of the second cantilever 3122 along the major axis side 3113a, thereby utilizing the design that the dome 312 is not as wide as the outer edge of the voice coil 32, achieving reduction of antiphase vibration, improvement of FR high frequency effect, and improvement of sound emission effect of the sound emission device 100.

In this embodiment, the extension length D2 of the second suspension arm 3122 along the long-axis side 3113a is ≦ 3mm, which is satisfied by adjusting and controlling the ratio of the extension length D2 of the second suspension arm 3122 along the long-axis side 3113a to the extension length W1 of the dome 312 along the long-axis side 3113 a: d2/W1 is more than or equal to 0.05 and less than or equal to 0.1, so that the anti-phase vibration of the diaphragm 311 in the vibration process is effectively reduced, the FR high-frequency effect is improved, and the sound production effect of the sound production device 100 is improved. It should be noted that the extension length D1 of the first suspension arm 3121 along the minor axis edge 3113b is less than the extension length D2 of the second suspension arm 3122 along the major axis edge 3113 a. For example, d1 may be 0.2mm, 0.5mm, 0.7mm, 0.9mm, and the like.

The utility model discloses a sound generating mechanism 100 is through setting up magnetic circuit 2 and vibration system 3 on shell 1, under the condition that the length ratio of major axis limit 3113a and minor axis limit 3113b at vibrating diaphragm 311 is greater than or equal to 2, part through between the outer border with dome 312 and the periphery wall of voice coil loudspeaker voice coil 32 forms the cantilever portion, the cantilever portion includes first cantilever 3121 that extends along major axis limit 3113a direction and the second cantilever 3122 that extends along minor axis limit 3113b direction, make extension length D1 of first cantilever 3121 be less than length D2 of second cantilever 3122, also be through the design unequal width design of dome 312 apart from voice coil loudspeaker voice coil 32 outward flange, thereby first cantilever 3121 and second cantilever 3122 that utilize dome 312 are unequal, in order to reach and reduce the antiphase vibration, improve FR high frequency effect, in order to make the frequency response peak valley difference reduce 30%.

In one embodiment, the extension length D2 of the second cantilever 3122 is greater than or equal to 2 mm. It can be appreciated that the extended length D2 of the second suspension arm 3122 is the extended length of the second suspension arm 3122 along the long axis side extension direction, as shown in fig. 6. Optionally, the extension length D2 of the second cantilever 3122 ranges from 2mm to 3 mm. Therefore, the matching between the diaphragm 311 and the dome 312 is ensured, the anti-phase vibration can be reduced, and the second cantilever 3122 of the dome 312 can be prevented from extending to the ring-folded portion 3112 of the diaphragm 311, so that when the diaphragm 311 vibrates, the interference caused by the vibration of the ring-folded portion 3112 by the second cantilever 3122 of the dome 312 can be prevented. Alternatively, the extension length D2 of the second suspension arm 3122 may be 2mm, 2.5mm, 3mm, etc., which is not limited herein.

It can be understood that, as long as the extension length D1 of the first cantilever 3121 is ensured to be less than the length D2 of the second cantilever 3122, that is, when the length D2 of the second cantilever 3122 is 2mm, the extension length D1 of the first cantilever 3121 has a value less than 2 mm; when the length D2 of the second suspension arm 3122 is 3mm, the extension length D1 of the first suspension arm 3121 may be less than 3mm, which is specifically selected according to practical situations and is not limited herein.

In one embodiment, the extension of the dome 312 along the minor axis edge is W2, and the extension of the first suspension arm 3121 along the minor axis edge 3113b is D1: D1/W2 is more than or equal to 0.05 and less than or equal to 0.1. It will be appreciated that by adjusting and controlling the ratio of the extension length D1 of the first suspension arm 3121 along the minor axis edge 3113b to the extension length W2 of the dome 312 along the minor axis edge 3113 b: D1/W1 is more than or equal to 0.05 and less than or equal to 0.1, so that the anti-phase vibration of the diaphragm 31 in the vibration process is effectively reduced, the FR high-frequency effect is improved, and the sound production effect of the sound production device 100 is improved. Alternatively, for example, d1/W2 may be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, and so forth.

In one embodiment, the ratio of the extension length D1 of the first suspension arm 3121 along the minor axis edge 3113b to the length L2 of the minor axis edge 3113b is less than 0.05. It can be understood that, as shown in fig. 7, by controlling the ratio of the extension length D1 of the first cantilever 3121 along the minor axis side 3113b to the length L2 of the minor axis side 3113b to be less than 0.05, it can be ensured that the first cantilever 3121 of the dome 312 does not affect the vibration of the corrugated rim portion 3112 of the diaphragm 311, and at the same time, that the corrugated rim portion 3112 of the diaphragm 311 has a good vibration contraction effect.

In this embodiment, the dome 312 has two first cantilevers 3121 formed corresponding to two long-axis sides 3113a of the diaphragm 311, that is, the cantilever portion includes two first cantilevers 3121 extending along the long-axis side 3113a, and the two first cantilevers 3121 are located on two opposite sides of the voice coil 32 corresponding to the long-axis side 3113 a. It is understood that D1 is the extension of the first suspension arm 3121 along the minor axis edge 3113b on one side of the dome 312, where the ratio of the extension D1 of one first suspension arm 3121 along the minor axis edge 3113b to the length of the minor axis edge is less than 0.05.

In one embodiment, the ratio of the extension length D2 of the second suspension arm 3122 along the long axis edge 3113a to the length L1 of the long axis edge 3113a is less than 0.05. It can be understood that, as shown in fig. 6, by controlling the ratio of the extension length D2 of the second cantilever 3122 along the long axis side 3113a to the length L1 of the long axis side 3113a within a range less than 0.05, it can be ensured that the second cantilever 3122 of the dome 312 does not affect the vibration of the corrugated rim portion 3112 of the diaphragm 311, and at the same time, that the corrugated rim portion 3112 of the diaphragm 311 has a good vibration contraction effect.

In this embodiment, the dome 312 is formed with two second cantilevers 3122 corresponding to the two short sides 3113b of the diaphragm 311, that is, the cantilever portion includes two second cantilevers 3122 extending along the short sides 3113b, and the two second cantilevers 3122 are located on two opposite sides of the voice coil 32 corresponding to the short sides 3113 b. It is to be understood that D2 is the extension of the second cantilevered arm 3122 along the major axis edge 3113a on one side of the dome 312, where the ratio of the extension D2 of one second cantilevered arm 3122 along the minor axis edge 3113b to the length L1 of the major axis edge 3113a is less than 0.05.

In one embodiment, the vertical projection area of the dome 312 is defined as S2, and the vertical projection area of the cantilever portion is defined as S3; wherein S3/S2 is less than or equal to 0.3.

In this embodiment, by controlling the ratio of the vertical projection area of the cantilever portion to be S3 to the vertical projection area of the dome 312 to be S2 to be 0.3 or less, it is ensured that the cantilever portion of the dome 312 does not affect the vibration of the corrugated rim portion 3112 of the diaphragm 311 on the premise of preventing the reverse vibration, and at the same time, the corrugated rim portion 3112 of the diaphragm 311 has a good vibration contraction effect, and the reinforcing effect of the dome 312 on the diaphragm 311 is also ensured.

In one embodiment, the housing 1 includes a plastic part 12 and a metal part 11, and the plastic part 12 and the metal part 11 are integrally injection molded.

In the present embodiment, as shown in fig. 5 and 7, the housing 1 is configured as a plastic part 12 and a metal part 11 which are integrally injection molded, so as to ensure the structural strength of the housing 1, and effectively reduce the thickness dimension of the housing 1, thereby increasing the volume of the sound cavity of the sound generating device 100, and improving the acoustic effect of the sound generating device 100.

It can be understood that the metal component 11 is embedded in the plastic component 12, that is, a cavity is provided in the plastic component 12, and the metal component 11 is disposed in the cavity. In the present embodiment, the plastic part 12 is wrapped around the metal part 11. Optionally, the plastic part 12 is made of a plastic material, the metal part 11 is formed by processing a metal sheet, the metal part 11 formed by processing the metal sheet is placed in a mold, and a liquid plastic material is injected into the mold, so that the liquid plastic material is wrapped on the outer side of the metal part 11, and the plastic part 12 and the metal part 11 are integrally formed in an injection molding mode to form the housing 1.

In this embodiment, the plastic part 12 and the metal part 11 of the housing 1 may be integrally formed by an injection molding process, so as to improve the structural strength of the housing 1 and the sealing effect of the housing 1.

In one embodiment, the housing 1 includes a vertical wall 13 and a flat wall 14 formed by bending one end of the vertical wall 13, one end of the vertical wall 13 away from the flat wall 14 is connected to the diaphragm 311, a connecting protrusion 15 is protruded from one side of the flat wall 14 corresponding to the long axis edge 3113a of the diaphragm 311, and the connecting protrusion 15 is connected to the magnetic circuit system 2.

In the present embodiment, as shown in fig. 5 and 7, the vertical wall 13 and the flat wall 14 of the housing 1 are disposed at an included angle and enclose to form an accommodating space, and the flat wall 14 is formed by bending one end of the vertical wall 13 toward the accommodating space. It is understood that the outer periphery of the diaphragm 311 (i.e., the fixing portion 3113) of the diaphragm assembly 31 is connected to an end of the vertical wall 13 away from the flat wall 14 to cover the opening at the end of the accommodating space. The straight wall 14 is convexly provided with the connecting convex part 15 at a side corresponding to the long axis side 3113a, and the connecting convex part 15 is connected with the magnetic circuit system 2, so that the vibrating diaphragm 311, the vertical wall 13, the straight wall 14, the connecting convex part 15 and the magnetic circuit system 2 are matched to form an acoustic cavity.

It will be appreciated that the plastic part 12 of the housing 1 is formed with a vertical wall 13 and a flat wall 14, the metal part 11 is disposed within the plastic part 12, a portion of the metal part 11 is located within the vertical wall 13, and a portion of the metal part 11 is located within the flat wall 14. In the present embodiment, the flat wall 14 has a first side wall corresponding to the long axis side of the housing 1 and a second side wall corresponding to the short axis side, and the connection convex portion 15 is protruded on the first side wall of the flat wall 14, so that the connection convex portion 15 is connected to the magnetic circuit system 2, thereby improving the connection stability between the magnetic circuit system 2 and the housing 1. By providing the concave groove 151 in the link portion 3112 of the connecting convex portion 15 corresponding to the diaphragm 311, a vibration avoiding space is provided for the link portion 3112 by the concave groove 151, so as to improve vibration effect and acoustic performance.

In one embodiment, the side of the flat wall 14 corresponding to the short shaft side 3113b of the diaphragm 311 is spaced from the magnetic circuit system 2 to form the air permeable gap 16.

In this embodiment, as shown in fig. 6, one side of the straight wall 14 corresponding to the short axis is a second side wall, and the second side wall is spaced from the magnetic circuit system 2 to form an air-permeable gap 16 communicating with the acoustic cavity, so that the air pressure in the acoustic cavity can be balanced by the air-permeable gap 16 to improve the vibration effect of the diaphragm 311.

Under the condition that the length ratio of the major axis side 3113a and the minor axis side 3113b of the vibrating diaphragm 311 is not less than 2, when the vibrating diaphragm 311 vibrates under the drive of the voice coil 32, the air flow in the sound cavity cannot leak in time on one side of the long edge of the housing 1, so that the vibration of the vibrating diaphragm 311 is reflected in the direction of the major axis side 3113a to form standing waves, thereby the high frequency response of the sound generating device 100 is poor, and the audio effect is influenced. In this embodiment, the first side wall is provided with the sound leaking hole communicated with the sound cavity, so that when the vibrating diaphragm 311 vibrates, the sound airflow generated when the vibrating diaphragm 311 vibrates is leaked in time in the long axis direction by using the sound leaking hole, and the sound airflow is prevented from being reflected in the direction of the long axis side 3113a, i.e., from forming a standing wave, thereby improving the high frequency response of the sound generating device 100, and further improving the audio effect.

In one embodiment, the vibration system 3 further includes a centering pad 33 disposed corresponding to the air-permeable gap 16, one end of the centering pad 33 is connected to the flat wall 14, and the other end of the centering pad 33 is connected to the voice coil 32.

In this embodiment, as shown in fig. 5 and fig. 6, the centering sheet 33 is disposed such that one end of the centering sheet 33 is connected to the flat wall 14 of the housing 1, and the other end of the centering sheet 33 is connected to the voice coil 32, so as to balance and stabilize the vibration of the voice coil 32 driving the diaphragm 311 by the centering sheet 33, and prevent the voice coil 32 driving the diaphragm 311 from swinging or polarizing.

It can be understood that the centering branch piece 33 can be made of FPCB, or a conductive circuit is disposed in the centering branch piece 33, so that one end of the centering branch piece 33 can be electrically connected to the lead of the voice coil 32, and the other end of the centering branch piece 33 is fixed on the housing 1 for being connected to and conducted with an external circuit, so that the external circuit is connected to and conducted with the voice coil 32 by using the centering branch piece 33, and the risk of wire breakage of the lead of the voice coil 32 in the vibration process is effectively avoided.

In this embodiment, the two centering branch pieces 33 are symmetrically disposed, and the two centering branch pieces 33 respectively correspond to the air permeable gaps 16 on the short axis side of the housing 1, so that the air permeable gaps 16 can be understood to balance the air pressure in the acoustic cavity, and the air permeable gaps 16 can be used to provide an installation space for the centering branch pieces 33, so as to ensure that the centering branch pieces 33 do not interfere with the voice coil 32 when vibrating.

It will be appreciated that the spider 33 comprises an outer fixing portion connected to the housing 1, an inner fixing portion connected to the voice coil 32 and a resilient portion connected between the outer fixing portion and the inner fixing portion. The inner fixing portion extends from the elastic portion toward both sides of the major axis side and is bent toward the voice coil 32. In the present embodiment, the inner fixing portion is provided with an inner pad to which the voice coil 32 is solder-connected. The outer fixed part is provided with an outer bonding pad, and the outer bonding pad is convenient to be welded and conducted with an external circuit.

In an embodiment, the magnetic circuit system 2 includes a magnetic yoke 22 and a magnetic circuit portion 23, wherein the magnetic yoke 22 includes a bottom wall 221 and a side wall 222, the side wall 222 is formed by bending and extending a periphery of the bottom wall 221 toward the diaphragm 311, the side wall 222 and the bottom wall 221 enclose to form a mounting groove 223, the side wall 222 is connected to the housing 1, and the magnetic circuit portion 23 is disposed in the mounting groove 223 and spaced from the side wall 222 to form the magnetic gap 21.

In the present embodiment, as shown in fig. 5 to 7, the magnetic conductive yoke 22 may be made of a magnetic conductive plate. The magnetic yoke 22 is provided with a bottom wall 221 and a side wall 222 provided at the periphery of the bottom wall 221 so that the side wall 222 and the bottom wall 221 enclose a mounting groove 223, whereby the fixed magnetic circuit portion 23 is mounted by the mounting groove 223. It can be understood that the magnetic circuit system 2 is fixedly connected to the housing 1 through the side wall 222 of the magnetic yoke 22. The side wall 222 is fixedly connected to the connecting projection 15 of the flat wall 14 of the housing 1. Alternatively, the connecting protrusion 15 and the sidewall 222 may be connected by bonding or welding, which is not limited herein.

It will be appreciated that the magnetic circuit portion 23 is disposed in the mounting groove 223 and spaced apart from the side wall 222 to form the magnetic gap 21, thereby providing a mounting space for the voice coil 32. In the present embodiment, the magnetic circuit portion 23 includes a central magnet and a central magnetic conductive plate, which are stacked, and the central magnet is sandwiched between the central magnetic conductive plate and the bottom wall 221, so that the peripheral edges of the central magnet and the central magnetic conductive plate are spaced from the side wall 222 to form the magnetic gap 21, and at this time, the magnetic field generated by the magnetic circuit portion 23 acts on the voice coil 32 in the magnetic gap 21 to drive the voice coil 32 to move and cut the magnetic induction lines in the magnetic gap 21.

Optionally, the central magnet and the central magnetic conductive plate have the same structural contour, and the central magnet and the central magnetic conductive plate may be a plate structure or a ring structure, which is not limited herein.

In one embodiment, the side walls 222 include a plurality of side walls 222, and the plurality of side walls 222 are spaced along the periphery of the bottom wall 221. In this embodiment, as shown in fig. 5 to 7, the magnetic yoke 22 has a square structure, that is, the bottom wall 221 of the magnetic yoke 22 has a square structure, the bottom wall 221 has four sides, and the four sides of the bottom wall 221 are bent and extended toward one side of the diaphragm 311 to form the sidewall 222.

It is understood that the sidewall 222 may be an annular structure. Of course, the side walls 222 include four side walls 222, and four side walls 222 are disposed corresponding to four sides of the bottom wall 221, that is, a gap is formed between two adjacent side walls 222, and the gap facilitates the connection of the centering branch 33 extending into the magnetic gap 21 through the gap and connecting with the voice coil 32.

In one embodiment, the bottom wall 221 is provided with a groove 224 corresponding to the magnetic gap 21, the groove 224 being provided around the magnetic circuit portion 23. It will be appreciated that, as shown in fig. 5 to 7, the groove 224 is used to provide a space for the voice coil 32 to move by providing the groove 224 on the bottom wall 221.

In the present embodiment, the groove 224 is provided around the magnetic path portion 23, that is, a convex structure is formed in the middle of the bottom wall 221, the groove 224 is provided around the convex structure, and the central magnet of the magnetic path portion 23 is attached to the convex structure of the bottom wall 221.

The utility model also provides an electronic equipment, this electronic equipment include equipment casing and foretell sound generating mechanism 100, and sound generating mechanism 100 locates equipment casing. The specific structure of the sound generating device 100 refers to the foregoing embodiments, and since the electronic device adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.

The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the concepts of the present invention utilize the equivalent structure transformation of the content of the specification and the attached drawings, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A diaphragm is applied to a sound production device and is characterized in that the diaphragm is provided with a long shaft side and a short shaft side which are connected end to end, and the length ratio of the long shaft side to the short shaft side is more than or equal to 2;

2. The diaphragm of claim 1, wherein along the extension direction of the long axis side, the extension lengths a of the first segments along the short axis side are the same;

3. The diaphragm of claim 1, wherein the ratio of the length b of the second segment extending along the long axis side to the length a of the first segment extending along the short axis side is in a range of 1 to 3.

4. The diaphragm of claim 1, wherein the ratio of the extension length b of the second section along the long axis side to the length L1 of the long axis side is in the range of 0.04 to 0.15;

5. The diaphragm of claim 1, wherein a hollow portion and a connecting portion are disposed at the central portion, and two ends of the connecting portion are connected to two opposite sides of the hollow portion corresponding to the long axis side, so as to divide the hollow portion into hollow holes disposed at intervals.

6. The diaphragm of claim 5, wherein the length of the long axis side is defined as L1, the length of the short axis side is defined as L2, the vertical projection area of the hollowed holes is defined as S1, the number of the hollowed holes is defined as N, and N is greater than or equal to 2; wherein, (N S1)/(L1L 2) is not less than 0.27.

7. The diaphragm of claim 5, wherein the ratio of the extension length d1 of the connecting portion along the long axis side to the length L1 of the long axis side is in a range of 0.04 to 0.8;

8. The diaphragm of claim 5, wherein the connecting portion includes a plurality of connecting portions, and the plurality of connecting portions are arranged at intervals.

9. The diaphragm of claim 8, wherein the plurality of connecting portions are arranged at intervals along an extension direction of the long axis side;

10. The diaphragm of claim 1, wherein the ratio of the lengths of the long axis side and the short axis side is less than or equal to 3.5.

11. The diaphragm of any one of claims 1 to 10, wherein the young's modulus of the diaphragm is in a range of 20MP to 350 MP;

and/or the tensile strength range of the diaphragm is 30 MP-100 MP.

12. A sound generating device, the sound generating device comprising:

a housing;

the magnetic circuit system is connected with the shell and provided with a magnetic gap; and

a vibration system, the vibration system includes a diaphragm assembly and a voice coil, one end of the voice coil is connected with the diaphragm assembly, the other end of the voice coil is suspended in the magnetic gap, the diaphragm assembly includes the diaphragm according to any one of claims 1 to 11 and a dome connected with the central portion of the diaphragm, the diaphragm is connected to the housing and is opposite to the magnetic circuit.

13. The sound generating apparatus according to claim 12, wherein a portion between an outer edge of the dome and the outer peripheral wall of the voice coil forms a cantilever portion, the cantilever portion comprises a first cantilever extending along a major-axis side of the diaphragm and a second cantilever extending along a minor-axis side of the diaphragm, an extension D1 of the first cantilever along the minor-axis side is smaller than an extension D2 of the second cantilever along the major-axis side, wherein D2 is no greater than 3mm, an extension of the dome along the major-axis side is W1, and an extension D2 of the second cantilever along the major-axis side satisfies: d2/W1 is more than or equal to 0.05 and less than or equal to 0.1.

14. The device according to claim 13, wherein the extension length D2 of the second cantilever is greater than or equal to 2 mm.

15. The apparatus according to claim 13, wherein said dome has an extension W2 along said minor axis, and wherein said first suspension arm has an extension D1 along said minor axis that satisfies: D1/W2 is more than or equal to 0.05 and less than or equal to 0.1.

16. The sound emitting device of claim 13, wherein a ratio of an extension length D1 of the first cantilever along the minor axis side to a length L2 of the minor axis side is less than 0.05;

17. The sound generating apparatus of claim 13, wherein the area of the vertical projection of the dome is defined as S2, and the area of the vertical projection of the cantilever portion is defined as S3;

wherein S3/S2 is less than or equal to 0.3.

18. An electronic device comprising a device housing and a sound generating device according to any one of claims 12 to 17, the sound generating device being provided in the device housing.