CN217240927U - Sound production device and electronic equipment - Google Patents

Abstract

The utility model discloses a sound generating mechanism and electronic equipment, this sound generating mechanism includes the shell, magnetic circuit and vibration system, magnetic circuit locates in the accommodating space of shell, vibration system's voice coil loudspeaker voice coil's one end is connected with the vibrating diaphragm subassembly, the other end hangs and locates in the magnetic gap, the periphery of vibrating diaphragm subassembly is followed and is connected with the shell, so that the vibrating diaphragm, shell and magnetic circuit enclose to close and form the vocal chamber, the first extension length of vibrating diaphragm and second extension length's ratio is not less than 2, the shell includes corresponds the first lateral wall that sets up with major axis limit and corresponds the second lateral wall that sets up with the minor axis limit, first lateral wall is equipped with the hole of letting out the sound that communicates with the vocal chamber, second lateral wall and magnetic circuit separate in order to inject the sound clearance of letting through with the vocal chamber intercommunication. The utility model aims at providing an effectively improve sound generating mechanism of high frequency response, this sound generating mechanism's aspect ratio is greater than under the 2 circumstances, effectively reduces inside sound wave reflection to reduce the standing wave, improve the high frequency response effect, promote the audio effect.

Description

Sound production device and electronic equipment

Technical Field

The utility model relates to an electroacoustic conversion technology field, in particular to sound generating mechanism and applied this sound generating mechanism's electronic equipment.

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 speaker structure generally includes a magnetic circuit system, a vibration system and an auxiliary system, the vibration system is an important component for realizing the electric-acoustic energy conversion, and the sound emission effect of the product is directly influenced by the quality of the performance of the vibration system.

In the related art, along with the rapid development of electronic products, higher requirements are provided for the loudspeaker, the loudspeaker needs to be highly adapted to the whole machine, and then the appearance of the loudspeaker is required to be narrower and longer, and when the vibrating diaphragm vibrates, the loudspeaker structure forms larger standing waves in the long axis direction, so that the high frequency response of the loudspeaker is poor, and the audio effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sound generating mechanism and electronic equipment, aims at providing an effective sound generating mechanism who improves the high frequency response, and this sound generating mechanism's aspect ratio is greater than under 2's the condition, effectively reduces inside sound wave reflection to reduce the standing wave, improve the high frequency response effect, promote the audio effect.

In order to achieve the above object, the utility model provides a sound generating device, sound generating device includes:

a housing defining a receiving space, the housing having a major axis side and a minor axis side;

the magnetic circuit system is arranged in the accommodating space and is provided with a magnetic gap;

the vibration system comprises a vibration diaphragm assembly and a voice coil, one end of the voice coil is connected with the vibration diaphragm assembly, the other end of the voice coil is suspended in the magnetic gap, the vibration diaphragm assembly comprises a vibration diaphragm and a ball top, and the peripheral edge of the vibration diaphragm is connected with the shell so that the vibration diaphragm, the shell and the magnetic circuit system are enclosed to form an acoustic cavity;

the diaphragm is provided with a first extending length extending along the direction of the long axis side and a second extending length extending along the short axis side, and the ratio of the first extending length to the second extending length is not less than 2;

the shell comprises a first side wall and a second side wall, the first side wall corresponds to the long shaft side, the second side wall corresponds to the short shaft side, the first side wall and the second side wall are arranged opposite to the diaphragm assembly, the first side wall is provided with a sound leakage hole communicated with the sound cavity, and the second side wall is spaced from the magnetic circuit system to limit a sound transmission gap communicated with the sound cavity.

In one embodiment, the ratio of the length of the major axis side to the length of the minor axis side is not less than 2.

In an embodiment, a ratio of the first extension length to the second extension length is less than or equal to 3.5

In one embodiment, the sound emitting area of the sound leakage hole is defined as S, the first extension length is defined as L1, and the second extension length is defined as L2;

wherein, S/(L1L 2) is not less than 0.015 and not more than 0.09.

In one embodiment, the ratio of the extension length of the sound leakage hole along the extension direction of the long axis side to the first extension length L1 ranges from 0.1 to 0.8;

and/or the ratio of the length of the sound leakage hole along the extension direction of the short axis edge to the second extension length L2 ranges from 0.05 to 0.1.

In an embodiment, the number of the first side walls is two, the two first side walls are arranged at intervals along the direction of the short axis edge, and each first side wall is provided with the sound leakage hole.

In an embodiment, the sound leakage hole on at least one of the first side walls includes a plurality of sound leakage holes, and the plurality of sound leakage holes are arranged at intervals.

In an embodiment, a ratio of the distance a from the sound leakage hole to the outer side of the first side wall to the second extension length L2 is in a range of 0.05-0.2.

In one embodiment, the sound outlet is a circular hole, an elliptical hole, a triangular hole, a square hole, a strip-shaped hole or a kidney-shaped hole.

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

In an embodiment, the housing includes a vertical wall and a straight wall formed by bending one end of the vertical wall, the end of the vertical wall far away from the straight wall is connected to the diaphragm, the straight wall includes the first side wall and the second side wall which are connected end to end, the first side wall is convexly provided with a connecting protrusion, and the connecting protrusion is connected to the magnetic circuit system.

In an embodiment, the diaphragm includes a central portion, a folded ring portion surrounding the central portion, and a fixing portion connected to an outer side of the folded ring portion, the fixing portion is connected to the vertical wall, the folded ring portion corresponds to the sound release hole, and the connecting protrusion is concavely provided with a concave groove corresponding to the folded ring portion.

In an embodiment, the vibration system further includes a centering support piece disposed corresponding to the sound-transmitting gap, one end of the centering support piece is connected to the second sidewall, and the other end of the centering support piece is connected to the voice coil.

In one embodiment, the magnetic circuit system comprises:

the magnetic conductive yoke comprises a bottom wall and a side wall, the side wall is formed by bending and extending the periphery of the bottom wall towards the vibrating diaphragm component, the side wall and the bottom wall enclose to form a mounting groove, and the side wall is connected with the shell; and

a magnetic circuit portion disposed in the mounting groove and spaced apart from the side wall to form the magnetic gap.

In one embodiment, the side wall comprises a plurality of side walls which are arranged at intervals along the periphery of the bottom wall;

and/or the bottom wall is provided with a groove corresponding to the magnetic gap, and the groove is arranged around the magnetic circuit part.

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

The sound production device of the technical proposal of the utility model arranges the magnetic circuit system and the vibration system on the shell, under the condition that the ratio of the first extending length of the vibration film of the vibration system extending along the long axis side direction of the shell to the second extending length of the vibration film extending along the short axis side of the shell is not less than 2, the first side wall arranged corresponding to the long axis side and the second side wall arranged corresponding to the short axis side are arranged on the shell, so that the first side wall and the second side wall are arranged opposite to the vibration film component, the sound leakage hole communicated with the sound cavity is arranged on the first side wall, the sound transmission gap communicated with the sound cavity is limited by the second side wall and the magnetic circuit system, thereby the vibration sound air flow generated by the vibration film in the sound cavity is leaked by utilizing the sound transmission gap and the sound leakage hole, the sound reflection generated by the vibration film in the sound cavity is avoided, thereby the standing wave formation in the sound cavity is effectively prevented, and the high frequency response effect is improved, and the audio effect 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 used in the embodiments or the prior art descriptions 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 sound generating device according to an embodiment of the present invention;

fig. 2 is an exploded view of a sound generating device according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of a sound generating device according to an embodiment of the present invention;

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

fig. 5 is a schematic bottom view of a sound generating device according to another embodiment of the present invention;

fig. 6 is a schematic bottom view of a sound generating device according to another embodiment of the present invention;

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

fig. 8 is a schematic cross-sectional view of the housing according to an embodiment of the present invention.

The reference numbers indicate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound producing device	222	Side wall
1	Outer casing	223	Mounting groove
				11	Metal part	224	Groove
12	Plastic part	23	Magnetic circuit part
				13	Vertical wall	3	Vibration system
14	Straight wall	31	Vibrating diaphragm
				15	Connecting projection	311	Center part
16	Acoustically transparent gaps	312	Folded ring part
				17	Sound release hole	313	Fixing part
2	Magnetic circuit system	32	Ball top
				21	Magnetic gap	33	Voice coil
22	Magnetic conductive yoke	34	Centering support plate
				221	Bottom wall	4	Acoustic chamber

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.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the 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 or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

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 speaker structure generally includes a magnetic circuit system, a vibration system and an auxiliary system, the vibration system is an important component for realizing the electric-acoustic energy conversion, and the sound emission effect of the product is directly influenced by the quality of the performance of the vibration system.

In the related art, along with the rapid development of electronic products, higher requirements are provided for a loudspeaker, the loudspeaker needs to be highly adapted to a complete machine, and then the appearance of the loudspeaker is required to be narrower and longer, and when the vibrating diaphragm vibrates, the loudspeaker structure can form larger standing waves in the long axis direction, so that the high frequency response of the loudspeaker is poor, and the audio effect is influenced.

Based on the above conception and problems, the present invention provides a sound generating device 100. It can be 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.

Please refer to fig. 1 to 8 in combination, in the embodiment of the present invention, this sound generating device 100 includes a housing 1, a magnetic circuit 2 and a vibration system 3, the housing 1 defines an accommodating space, the housing 1 has a long axis side and a short axis side, the magnetic circuit 2 is disposed in the accommodating space, the magnetic circuit 2 is equipped with a magnetic gap 21, the vibration system 3 includes a vibrating diaphragm assembly and a voice coil 33, one end of the voice coil 33 is connected with the vibrating diaphragm assembly, the other end of the voice coil 33 is suspended in the magnetic gap 21, the vibrating diaphragm assembly includes a vibrating diaphragm 31 and a ball top 32, the periphery of the vibrating diaphragm 31 is connected with the housing 1, so that the vibrating diaphragm 31, the housing 1 and the magnetic circuit 2 enclose and form a sound cavity 4.

The diaphragm 31 has a first extending length extending along the long axis side direction and a second extending length extending along the short axis side, and the ratio of the first extending length to the second extending length is not less than 2; the shell 1 comprises a first side wall and a second side wall, wherein the first side wall corresponds to the long axis side, the second side wall corresponds to the short axis side, the first side wall and the second side wall are arranged opposite to the vibrating diaphragm component, the first side wall is provided with a sound leakage hole 17 communicated with the sound cavity 4, and the second side wall is spaced from the magnetic circuit system 2 to define a sound transmission gap 16 communicated with the sound cavity 4.

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 configuration, the housing 1 having major and minor axis sides. It can be understood that the housing 1 has two opposite long axis sides and two short axis sides, two ends of the short axis sides are respectively connected with the two long axis sides, and two ends of the long axis sides are respectively connected with the two short axis sides, so that the housing 1 defines an accommodating 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 case 1 is formed by injection molding, the edge magnetic conductive plate of the magnetic circuit system 2 is first injection molded in the case 1 as an insert, or the magnetic circuit system 2 and the case 1 are fixed by adhesion, and then the other portions 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 the vibrating diaphragm subassembly and connects in the voice coil 33 of vibrating diaphragm subassembly, the one end and the vibrating diaphragm subassembly of voice coil 33 are connected, the other end of voice coil 33 hangs and locates in magnetic gap 21, so make voice coil 33 switch on with external circuit, utilize voice coil 33 to transmit electric energy to magnetic gap 21 of magnetic circuit 2, make the magnetic field that magnetic circuit 2 produced convert the electric energy into mechanical energy, thereby make voice coil 33 take place the vibration, and the vibrating diaphragm 31 that drives the vibrating diaphragm subassembly realizes the vibration sound production, further convert mechanical energy into acoustic energy. That is, after the voice coil 33 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 31 of the vibration system 3 to vibrate and generate sound.

It will be appreciated that the diaphragm assembly includes a diaphragm 31 and a dome 32 attached to a central portion of the diaphragm 31. The ball top 32 may be disposed on a side of the diaphragm 31 facing the voice coil 33, that is, the ball top 32 is disposed between the diaphragm 31 and the voice coil 33. Of course, the ball top 32 may also be disposed on a side of the diaphragm 31 opposite to the voice coil 33, that is, the voice coil 33 is connected to the diaphragm 31. By providing the dome 32 at the center of the diaphragm 31, the structural strength of the diaphragm 31 can be enhanced by the dome 32.

In this embodiment, the diaphragm 31 has long sides and short sides connected end to end, that is, the diaphragm 31 is disposed in a rectangle, and the diaphragm 31 has two opposite long sides and two short sides. It can be understood that the diaphragm 31 has a first extending length extending along the long axis side and a second extending length extending along the short axis side, that is, the long side of the diaphragm 31 corresponds to the long axis side and extends along the long axis side to form the first extending length, and the short side of the diaphragm 31 corresponds to the short axis side and extends along the short axis side to form the second extending length. The ratio of the lengths of the long side and the short side of the diaphragm 31 is not less than 2, that is, the ratio of the first extending length to the second extending length of the diaphragm 31 is not less than 2.

It can be understood that the outer periphery of the diaphragm 31 of the diaphragm assembly is connected to the housing 1, so that the diaphragm 31, the housing 1 and the magnetic circuit system 2 enclose the acoustic cavity 4. The shell 1 comprises a first side wall and a second side wall, the first side wall and the second side wall are arranged corresponding to the long shaft side and the short shaft side, the first side wall and the second side wall are arranged opposite to the vibrating diaphragm assembly, so the first side wall of the shell 1 can be utilized to be connected with the magnetic circuit system 2, the magnetic circuit system 2 is fixed, the second side wall and the magnetic circuit system 2 are utilized to separate to limit the sound transmission gap 16, the sound transmission gap 16 is communicated with the sound cavity 4, the sound transmission gaps 16 on the two sides of the long shaft of the vibrating diaphragm 31 are utilized to leak sound airflow generated by the vibrating diaphragm 31 in the sound cavity 4 when the vibrating diaphragm 31 vibrates, and the air pressure in the sound cavity 4 is balanced, so that the vibration effect of the vibrating diaphragm 31 is improved.

Under the condition that the length ratio of the long side and the short side of vibrating diaphragm 31 is not less than 2, vibrating diaphragm 31 vibrates under the drive of voice coil 33, because the length-width ratio of vibrating diaphragm 31 is bigger, and sound-transmitting gap 16 is located the major axis both sides of vibrating diaphragm 31, the air current in acoustic cavity 4 can't in time leak in major axis limit one side of shell 1, thereby make the sound wave in the transmission process and the spare part collision on the shell 1 take place to reflect, form great standing wave, thereby make the high frequency response of speaker poor, and then influence the audio effect. In this embodiment, the first sidewall is provided with the sound venting hole 17 communicated with the sound cavity 4, so that when the vibrating diaphragm 31 vibrates, the sound airflow generated by the vibration of the vibrating diaphragm 31 through the sound venting hole 17 leaks in time in the long axis direction, and the sound airflow is prevented from being reflected in the long axis direction, i.e., from forming standing waves, so as to improve the high frequency response of the sound generating device 100, and further improve the audio effect.

Alternatively, the first side walls of the housing 1 include two, the two first side walls are arranged at intervals along the direction of the short axis side, and each first side wall is provided with the sound leakage hole 17.

The sound production device 100 of the present invention is provided with the magnetic circuit system 2 and the vibration system 3 on the housing 1, under the condition that the ratio of the first extension length of the vibration film 31 of the vibration system 3 extending along the long axis side direction of the housing to the second extension length of the vibration film 31 extending along the short axis side of the housing 1 is not less than 2, by providing the first side wall corresponding to the long axis side and the second side wall corresponding to the short axis side on the housing 1, the first side wall and the second side wall are arranged opposite to the vibration film assembly, by providing the sound leakage hole 17 communicating with the sound cavity 4 on the first side wall, the second side wall is spaced from the magnetic circuit system 2 to define the sound transmission gap 16 communicating with the sound cavity 4, so as to utilize the sound transmission gap 16 and the sound leakage hole 17 to leak the vibration sound airflow generated by the vibration film 31 in the sound cavity 4, so as to avoid the generation of sound wave reflection in the sound cavity 4, thereby effectively preventing the formation of standing wave in the sound cavity 4, so as to improve the high frequency response effect and improve the audio effect.

In one embodiment, the ratio of the length of the major axis side to the length of the minor axis side is not less than 2. It can be understood that, as shown in fig. 1 to 7, the length of the long axis side of the housing 1 is the same as the first extending length of the long side of the diaphragm 31, and the length of the short axis side of the housing 1 is the same as the second extending length of the short side of the diaphragm 31, and when the ratio of the first extending length to the second extending length of the diaphragm 31 is not less than 2, the ratio of the length of the long axis side to the length of the short axis side of the housing 1 is not less than 2.

Of course, the length of the long axis side of the housing 1 may also be greater than the first extension length of the long side of the diaphragm 31, and the length of the short axis side of the housing 1 may also be greater than the second extension length of the short side of the diaphragm 31, which is not limited herein.

In this embodiment, the length of the long axis side of the housing 1 is the same as the first extension length of the long edge of the diaphragm 31, and the length of the short axis side of the housing 1 is the same as the second extension length of the short edge of the diaphragm 31, so that the effective vibration area of the diaphragm 31 can be ensured, the material of the housing 1 can be saved, and the sound generating device 100 can be highly adapted to the requirements of the whole machine for being narrower and longer in appearance and being more compact in structure when being applied to an electronic product.

In an embodiment, a ratio of the first extension length to the second extension length is less than or equal to 3.5, that is, a ratio of lengths (aspect ratio) of long sides and short sides of the diaphragm 31 is between 2 and 3.5, for example, the aspect ratio of the diaphragm 31 may be 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, and 3.5, etc. Therefore, with the above arrangement, the diaphragm 31 can be selected according to the size of the diaphragm, and can be applied to products of different specifications.

In one embodiment, the sound outlet area of the sound outlet 17 is defined as S, the first extension length is defined as L1, and the second extension length is defined as L2; wherein, S/(L1L 2) is not less than 0.015 and not more than 0.09.

In this embodiment, by controlling and adjusting the area ratio of the sound outlet area S of the sound outlet hole 17 to the diaphragm 31 to be within the range of 0.015 to 0.09, it can be ensured that the sound outlet hole 17 of the first side wall can fully realize leakage of sound airflow generated by vibration of the diaphragm 31 in the long axis side direction, and the diaphragm 31 is effectively prevented from being reflected in the long axis side direction to form standing waves when vibrating, so as to affect the high frequency response and the audio effect of the sound generating apparatus 100.

It will be appreciated that the area of the diaphragm 31 is the product of a first extension of the long side of the diaphragm 31 and a second extension of the short side of the diaphragm 31. Alternatively, the ratio of the sound emitting area S of the sound outlet hole 17 to the area of the diaphragm 31 is 0.015, 0.02, 0.025, 0.03, 0.035, 0.04, 0.045, 0.05, 0.055, 0.06, 0.065, 0.07, 0.075, 0.08, 0.085, 0.09, or the like, which is not limited herein.

In one embodiment, the ratio of the extension length of the sound leakage hole 17 along the extension direction of the long axis side to the first extension length L1 ranges from 0.1 to 0.8. It can be understood that, by controlling and adjusting the ratio range of the extension length of the sound vent 17 along the extension direction of the long axis edge to the first extension length L1 to be 0.1-0.8, it can be ensured that the sound vent 17 of the first side wall can sufficiently leak the sound airflow generated by the vibration of the diaphragm 31 in the long axis edge direction, and the standing wave formed by the reflection of the diaphragm 31 in the long axis edge direction when vibrating is effectively avoided, so as to affect the high frequency response and the audio effect of the sound generating apparatus 100; but also the structural strength of the first side wall of the housing 1.

In the present embodiment, the first side wall of the housing 1 is provided with one, two, three or more sound leakage holes 17. It can be understood that when N sound leakage holes 17 are disposed on the first side wall of the enclosure 1, where N is greater than or equal to 1, the extension length of each sound leakage hole 17 along the extension direction of the long axis edge is defined as d1, and the ratio of N × d1 to the first extension length L1 ranges from 0.1 to 0.8. That is, when the first side wall of the housing 1 is provided with one sound vent 17, the extension length of the sound vent 17 along the extension direction of the long axis edge is d1, and the ratio of d1 to the first extension length L1 is in the range of 0.1-0.8; when the first side wall of the housing 1 is provided with the plurality of sound leakage holes 17, the ratio of the sum of the extension lengths of the plurality of sound leakage holes 17 in the extension direction of the long axis side to the first extension length L1 ranges from 0.1 to 0.8.

Optionally, the ratio of the extension length of the sound leakage hole 17 in the extension direction of the long axis side to the first extension length L1 is 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc., which is not limited herein.

In one embodiment, the ratio of the length of the sound leakage hole 17 along the extension direction of the short axis side to the second extension length L2 is in the range of 0.05-0.1. It can be understood that, by controlling and adjusting the ratio range of the length of the sound leaking hole 17 along the short axis side extending direction to the second extending length L2 to be 0.05-0.1, it can be ensured that the sound leaking hole 17 of the first side wall can fully implement the leakage of the sound airflow generated by the vibration of the diaphragm 31 in the long axis side direction, and the standing wave formed by the reflection of the diaphragm 31 in the long axis side direction when vibrating is effectively avoided, so as to affect the high frequency response and the audio frequency effect of the sound generating apparatus 100; but also the structural strength of the first side wall of the housing 1.

In the present embodiment, the first side wall of the housing 1 is provided with one, two, three or more sound leakage holes 17. It can be understood that when the first side wall of the housing 1 is provided with N sound leaking holes 17, where N is greater than or equal to 1, and the N sound leaking holes 17 are arranged at intervals along the short axis side, the extending length of each sound leaking hole 17 along the extending direction of the short axis side is defined as d2, and the ratio of N × d1 to the second extending length L2 ranges from 0.05 to 0.1. That is, when the first side wall of the enclosure 1 is provided with one sound leakage hole 17, the extension length of the sound leakage hole 17 along the extension direction of the short axis side is d2, and the ratio of d2 to the second extension length L2 is in the range of 0.05-0.1; when the first side wall of the housing 1 is provided with the plurality of sound leakage holes 17, and when the plurality of sound leakage holes 17 are arranged at intervals along the short axis side, the ratio of the sum of the extension lengths of the plurality of sound leakage holes 17 in the extension direction of the short axis side to the second extension length L2 ranges from 0.05 to 0.1.

Alternatively, the ratio of the length of the sound leakage hole 17 in the extension direction of the short axis side to the second extension length L2 is 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, etc., and is not limited herein.

Optionally, the sound leakage hole 17 on the at least one first side wall includes a plurality of sound leakage holes 17, and the plurality of sound leakage holes 17 are arranged at intervals.

In an embodiment, each first sidewall is optionally provided with two sound leaking holes 17 distributed at intervals, and the two sound leaking holes 17 are arranged at intervals along the extension direction of the long axis edge. Optionally, when the sound holes 17 include a plurality of sound holes, the plurality of sound holes 17 are spaced and uniformly arranged along the extension direction of the long axis side. Or, the plurality of sound leaking holes 17 are arranged at intervals along the extension direction of the long axis edge, and the plurality of sound leaking holes 17 are symmetrically arranged with the center of the first side wall.

In one embodiment, the ratio of the distance a from the sound outlet 17 to the outer side of the first sidewall to the second extension length L2 is in the range of 0.05-0.2.

In this embodiment, as shown in fig. 4 to 6, by controlling the ratio range of the distance a from the sound outlet 17 to the outer side of the first side wall to the second extension length L2 to be 0.05 to 0.2, it can be ensured that the sound outlet 17 of the first side wall can sufficiently implement leakage of the sound airflow generated by the vibration of the diaphragm 31 in the long axis side direction, and the standing wave formed by the reflection of the diaphragm 31 in the long axis side direction when vibrating is effectively avoided, so as to affect the high frequency response and the audio effect of the sound generating apparatus 100; but also the structural strength of the first side wall of the housing 1.

It is understood that the ratio of the distance a from the sound leakage hole 17 to the outside of the first sidewall to the second extension length L2 is 0.05, 0.08, 0.1, 0.13, 0.15, 0.18, 0.2, etc., and is not limited herein.

Alternatively, the shape of the sound leakage hole 17 is a circular hole, an elliptical hole, a triangular hole, a square hole, a strip-shaped hole, a kidney-shaped hole, or the like, which is not limited herein.

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. 2, 3 and 8, 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 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 31, the flat wall 14 includes a first side wall and a second side wall connected end to end, the first side wall is convexly provided with a connecting protrusion 15, and the connecting protrusion 15 is connected to the magnetic circuit system 2.

In the present embodiment, as shown in fig. 1 to 3, 7 and 8, the vertical wall 13 and the straight wall 14 of the housing 1 are disposed at an included angle and enclose to form an accommodating space, and the straight wall 14 is formed by bending one end of the vertical wall 13 toward the accommodating space. It can be understood that the outer periphery of the diaphragm 31 of the diaphragm assembly is connected to the end of the vertical wall 13 away from the flat wall 14 to cover the opening at the end of the accommodating space. The connecting convex part 15 is convexly arranged on one side of the straight wall 14 corresponding to the long axis side, and the connecting convex part 15 is connected with the magnetic circuit system 2, so that the vibrating diaphragm 31, the vertical wall 13, the straight wall 14, the connecting convex part 15 and the magnetic circuit system 2 are matched to form the acoustic cavity 4.

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.

In this embodiment, 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 acoustically transparent gap 16 communicating with the acoustic cavity 4, so that the acoustically transparent gap 16 can balance the air pressure in the acoustic cavity to improve the vibration effect of the diaphragm 31.

In one embodiment, the diaphragm 31 includes a central portion 311, a ring-folded portion 312 surrounding the central portion 311, and a fixing portion 313 connected to an outer side of the ring-folded portion 312, the fixing portion 313 is connected to the vertical wall 13, the ring-folded portion 312 corresponds to the sound-releasing hole 17, and a concave groove is concavely formed in the connecting protrusion 15 corresponding to the ring-folded portion 312.

In this embodiment, as shown in fig. 1 to fig. 3, the central portion 311, the bending portion 312 and the fixing portion 313 of the diaphragm 31 are integrally formed. The folded ring part 312 is disposed around the central part 311 and between the central part 311 and the fixing part 313, and the folded ring part 312 may be a convex structure upward or downward. The diaphragm 31 is fixedly connected to the vertical wall 13 of the housing 1 by the fixing portion 313, so as to improve the connection stability and the sealing property of the housing 1 and the diaphragm 31. By providing the concave groove at the connecting convex portion 15 corresponding to the folded ring portion 312, a vibration avoiding space is provided for the folded ring portion 312 by using the concave groove, so as to improve the vibration effect and the acoustic performance.

It is understood that, in order to increase the effective vibration area of the diaphragm 31, the fixing portion 313 may be formed by extending the outer side of the corrugated portion 312 downwards or upwards, so that the fixing portion 313 is fixedly connected with the inner side wall or the outer side wall of the vertical wall 13.

In the present embodiment, the dome 32 is connected to the central portion 311, and the area of the dome 32 is smaller than or equal to the area of the central portion 311. It will be appreciated that the central portion 311 may be a flat plate structure, with the dome 32 attached to either the inside surface (the side facing the voice coil 33) or the outside surface (the side facing away from the voice coil 33) of the central portion 311. Alternatively, the dome 32 is connected to the inner side surface of the central portion 311, and the voice coil 33 is connected to a side of the dome 32 facing away from the central portion 311. Of course, in other embodiments, in order to reduce the weight of the diaphragm assembly, the central portion 311 is provided with a hollow structure, and the dome 32 is connected to the central portion 311 to cover the hollow structure, which is not limited herein.

In one embodiment, the vibration system 3 further includes a damper 34 disposed corresponding to the sound-transmitting gap 16, one end of the damper 34 is connected to the second sidewall, and the other end of the damper 34 is connected to the voice coil 33.

In this embodiment, as shown in fig. 2 to fig. 6, by providing the damper 34, one end of the damper 34 is connected to the flat wall 14 of the housing 1, and the other end of the damper 34 is connected to the voice coil 33, so that the damper 34 is utilized to balance and stabilize the vibration of the voice coil 33 driving the diaphragm 31, and the voice coil 33 driving the diaphragm 31 is prevented from swinging or polarizing.

It can be understood that centering branch piece 34 can adopt the FPCB to make, perhaps is provided with the conducting circuit in the centering branch piece 34, so one end that can utilize centering branch piece 34 and voice coil 33's lead wire conductive connection, the other end of centering branch piece 34 is fixed on shell 1 for switch on with external circuit connection, so utilize centering branch piece 34 to be connected external circuit and voice coil 33 and switch on, effectively avoid voice coil 33's lead wire to take place the broken string risk in vibration process.

In this embodiment, the two damper sheets 34 are symmetrically disposed, and the two damper sheets 34 respectively correspond to the sound transmission gap 16 of the short axis side corresponding to the housing 1, so that the air pressure in the sound transmission gap 16 can be understood, and the damper sheet 34 can be installed and kept away by using the sound transmission gap 16, so as to ensure that the damper sheet 34 does not interfere with the voice coil 33 when vibrating.

It will be appreciated that the spider 34 comprises an outer fixing portion connected to the housing 1, an inner fixing portion connected to the voice coil 33 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 33. In the present embodiment, the inner fixing portion is provided with an inner pad to which the voice coil 33 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, the magnetic yoke 22 includes a bottom wall 221 and a side wall 222, the side wall 222 is formed by extending and bending the periphery of the bottom wall 221 toward the diaphragm assembly, 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. 2 and 3, the magnetic yoke 22 may be made of a magnetic conductive plate. The magnetic circuit portion 23 is mounted and fixed by the mounting groove 223 by providing the magnetic yoke 22 as the bottom wall 221 and the side wall 222 provided at the periphery of the bottom wall 221 such that the side wall 222 and the bottom wall 221 enclose 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 33. 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 33 in the magnetic gap 21 to drive the voice coil 33 to move in the magnetic gap 21 to cut the magnetic induction lines.

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. 2 to fig. 6, the magnetic conductive yoke 22 is of a square structure, that is, the bottom wall 221 of the magnetic conductive yoke 22 is of 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 31 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 support 34 extending into the magnetic gap 21 through the gap and connecting with the voice coil 33.

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. 2 to 4, by providing the groove 224 on the bottom wall 221, the groove 224 is used to provide a space for the voice coil 33 to move.

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. Alternatively, the sound generating device 100 may be a cell phone, a computer, a Pad, a VR, an AR, or the like. It can be understood that, 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 patent scope of the present invention is limited, all under the idea of the present invention, the equivalent structure transformation made by the contents of the specification and the attached drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims (16)

1. A sound generating device, characterized in that the sound generating device comprises:

a housing defining a receiving space, the housing having a major axis side and a minor axis side;

the magnetic circuit system is arranged in the accommodating space and is provided with a magnetic gap;

the vibration system comprises a vibration diaphragm component and a voice coil, one end of the voice coil is connected with the vibration diaphragm component, the other end of the voice coil is suspended in the magnetic gap, the vibration diaphragm component comprises a vibration diaphragm and a ball top, and the peripheral edge of the vibration diaphragm is connected with the shell so that the vibration diaphragm, the shell and the magnetic circuit system are enclosed to form an acoustic cavity;

the diaphragm is provided with a first extending length extending along the direction of the long axis side and a second extending length extending along the short axis side, and the ratio of the first extending length to the second extending length is not less than 2;

the shell comprises a first side wall and a second side wall, the first side wall corresponds to the long shaft side, the second side wall corresponds to the short shaft side, the first side wall and the second side wall are arranged opposite to the diaphragm assembly, the first side wall is provided with a sound leakage hole communicated with the sound cavity, and the second side wall is spaced from the magnetic circuit system to limit a sound transmission gap communicated with the sound cavity.

2. The apparatus according to claim 1, wherein a ratio of a length of said major axis side to a length of said minor axis side is not less than 2.

3. The apparatus according to claim 1, wherein a ratio of said first extension length to said second extension length is equal to or less than 3.5.

4. The sound generating apparatus as claimed in claim 1, wherein the sound emitting area of said sound leaking hole is defined as S, the first extension length is defined as L1, and the second extension length is defined as L2;

wherein S/(L1L 2) is not less than 0.015 and not more than 0.09.

5. The sound generating apparatus as claimed in claim 1, wherein the ratio of the extension length of said sound outlet along the extension direction of said long axis side to said first extension length L1 is in the range of 0.1-0.8;

and/or the ratio of the length of the sound leakage hole along the extension direction of the short axis edge to the second extension length L2 ranges from 0.05 to 0.1.

6. The sound generating apparatus according to claim 1, wherein said first side walls include two, two of said first side walls are spaced apart along said minor axis direction, and each of said first side walls is provided with said sound release hole.

7. The apparatus according to claim 6, wherein said at least one of said first side walls includes a plurality of said sound outlet holes, and said plurality of said sound outlet holes are spaced apart from each other.

8. The sound generating apparatus as claimed in claim 1, wherein the ratio of the distance a from the sound outlet hole to the outside of the first side wall to the second extension length L2 is in the range of 0.05-0.2.

9. The sound generating apparatus according to claim 1, wherein the shape of the sound outlet is a circular hole, an elliptical hole, a triangular hole, a square hole, a strip-shaped hole or a kidney-shaped hole.

10. The sound generating apparatus according to any one of claims 1 to 9, wherein the housing comprises a plastic part and a metal part, and the plastic part and the metal part are integrally injection-molded.

11. The sound generating apparatus according to any one of claims 1 to 9, wherein the housing includes a vertical wall and a flat wall formed by bending an end of the vertical wall, an end of the vertical wall away from the flat wall is connected to the diaphragm, the flat wall includes the first side wall and the second side wall connected end to end, the first side wall is convexly provided with a connecting protrusion, and the connecting protrusion is connected to the magnetic circuit system.

12. The sound production device as claimed in claim 11, wherein the diaphragm includes a central portion, a folded ring portion surrounding the central portion, and a fixing portion connected to an outer side of the folded ring portion, the fixing portion is connected to the vertical wall, the folded ring portion corresponds to the sound outlet, and the connecting protrusion is recessed into a recess corresponding to the folded ring portion.

13. The sound generating apparatus according to any one of claims 1 to 9, wherein the vibration system further comprises a centering pad disposed corresponding to the sound-transmitting gap, one end of the centering pad is connected to the second sidewall, and the other end of the centering pad is connected to the voice coil.

14. The sound generating apparatus according to any one of claims 1 to 9, wherein the magnetic circuit system comprises:

the magnetic conducting yoke comprises a bottom wall and a side wall, the side wall is formed by bending and extending the periphery of the bottom wall towards the vibrating diaphragm assembly, the side wall and the bottom wall enclose to form an installation groove, and the side wall is connected with the shell; and

a magnetic circuit portion disposed in the mounting groove and spaced apart from the side wall to form the magnetic gap.

15. The apparatus according to claim 14 wherein said side wall comprises a plurality of said side walls spaced along a periphery of said bottom wall;

and/or the bottom wall is provided with a groove corresponding to the magnetic gap, and the groove is arranged around the magnetic circuit part.

16. An electronic device comprising a device housing and a sound generating device according to any one of claims 1 to 15, the sound generating device being provided in the device housing.

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