CN216146436U - Earphone, speaker module and front protecting cover thereof - Google Patents

Abstract

This application mainly relates to earphone, speaker module and preceding protecting cover thereof, and preceding protecting cover is used for the lid to establish on the speaker module to protect the vibration system of speaker module, preceding protecting cover includes the main part and the flange portion of being connected with the main part, and the flange portion sets up in the periphery of main part, and is equipped with the sound short circuit hole. The application provides a preceding protecting cover can cover and establish on the speaker module, can protect vibration system not punctured by the foreign object, is equipped with the sound short circuit hole in the preceding sound chamber of intercommunication earphone and back sound chamber on the preceding protecting cover, can improve the acoustics expressive force of earphone. Wherein, because the edge of preceding protecting cover is located to the sound short circuit hole for other structures of speaker module need not to set up the through-hole that is used for realizing the sound short circuit, have good commonality, and preceding protecting cover just is equipped with the through-hole that is used for propagating the sound wave originally, and the sound short circuit hole can be with these through-holes shaping under a process, need not to increase extra process, production efficiency is high.

Description

Earphone, speaker module and front protecting cover thereof

Technical Field

The application relates to the technical field of electronic equipment, in particular to an earphone, a loudspeaker module and a front protective cover thereof.

Background

With the increasing popularity of electronic devices, electronic devices have become indispensable social and entertainment tools in people's daily life. Electronic devices are often used in combination, for example, a user connects an earphone with a mobile phone, and the earphone mode replaces a play-out mode, so that privacy is improved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a front protecting cover for the lid is established on the speaker module to protect the vibration system of speaker module, front protecting cover includes the main part and the flange portion of being connected with the main part, and the flange portion sets up in the periphery of main part, and is equipped with the sound short circuit hole.

The embodiment of the application further provides a loudspeaker module, the loudspeaker module comprises a support, a vibration system and the above embodiment, the front protecting cover is arranged at the opening end of the support, the support is arranged in an opening shape towards one end of the sound emitting direction of the loudspeaker module, the vibration system is arranged in the support, and the front protecting cover covers the opening end of the support.

The embodiment of the application provides an earphone again, the earphone includes casing and above-mentioned embodiment the speaker module, the casing has a holding chamber and a passageway of sounding, the speaker module sets up in the holding intracavity to separate the holding chamber for preceding sound chamber and back sound chamber, preceding sound chamber and the passageway intercommunication of sounding, preceding sound chamber and back sound chamber are through the intercommunication of sound short circuit hole.

The beneficial effect of this application is: the application provides a preceding protecting cover can cover and establish on the speaker module, can protect vibration system not punctured by the foreign object, is equipped with the preceding sound chamber of intercommunication earphone and the sound short circuit hole in back sound chamber on the preceding protecting cover, can improve the acoustics performance of earphone, especially the low frequency characteristic of sound for sound is heard more balancedly. Furthermore, as the acoustic short circuit hole is formed in the edge of the front protective cover, through holes for realizing acoustic short circuit do not need to be formed in other structures of the loudspeaker module, so that the loudspeaker module has good universality, the design difficulty of the loudspeaker module is reduced to a certain extent, and the production cost is reduced; moreover, the front protecting cover is originally provided with through holes for transmitting sound waves, and the sound short circuit holes can be formed with the through holes in one process without adding extra processes, so that the production efficiency is improved, and the production cost is reduced. In addition, because the edge of front shroud is located to the sound short circuit hole for vibration system's vibration area can not reduce because of seting up the through-hole that is used for realizing the sound short circuit, and then is favorable to guaranteeing the original acoustic effect of speaker module.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an exploded view of an embodiment of the headset of the present application;

FIG. 2 is a schematic diagram of the front and rear acoustic chambers of the earphone of FIG. 1;

FIG. 3 is a schematic diagram of an embodiment of the speaker module shown in FIG. 1;

fig. 4 is a schematic cross-sectional structure diagram of the speaker module of fig. 3;

FIG. 5 is a schematic structural view of an embodiment of the front protective cover of FIG. 3;

FIG. 6 is a schematic structural view of another embodiment of the front protective cover of FIG. 3;

FIG. 7 is a schematic structural view of another embodiment of the front protective cover of FIG. 3;

FIG. 8 is a schematic structural view of yet another embodiment of the front cover of FIG. 3.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive work are within the scope of the present application.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 and fig. 2 together, fig. 1 is an exploded schematic structural diagram of an embodiment of the earphone of the present application, and fig. 2 is a schematic structural diagram of an embodiment of the front and rear acoustic cavities of the earphone in fig. 1.

In the present application, the earphone 10 may be an electronic device having a sound playing function, such as a wired earphone or a wireless earphone. The embodiment takes the earphone 10 as a wireless earphone as an example for exemplary explanation. Further, the headset 10 may interact with a portable device such as a mobile phone, a tablet, a computer, a wearable device, and a music player through a wireless communication technology such as bluetooth.

Referring to fig. 1 and 2, the earphone 10 may include a housing 11, a speaker module 12, a battery 13, and a main board 14. The housing 11 has an accommodating cavity 111, and the speaker module 12, the battery 13 and the main board 14 can be disposed in the accommodating cavity 111. Further, the speaker module 12 is mainly used for converting the electrical signal into an acoustic signal, so that the user can hear the sound emitted from the earphone 10; the battery 13 is mainly used for supplying power to the speaker module 12, and the main board 14 is mainly used for controlling audio input/output of the speaker module 12, so that the speaker module 12 can convert an input audio signal into sound for output. Of course, microphones such as a sound pickup and a microphone may be further disposed in the accommodating cavity 111, so as to pick up the sound of the environment where the user is located and perform noise reduction processing, thereby improving the acoustic performance of the earphone 10; and/or to facilitate picking up the user's voice to implement a microphone function, thereby extending the range of applications of the headset 10.

It should be noted that: the housing 11 further has a sound outlet channel 1111, and the sound outlet channel 1111 communicates the accommodating cavity 111 with the outside of the earphone 11, so that the user can hear the air conduction sound generated by the earphone 10. Further, for in-ear headphones, the headphone 10 may also include an earplug 15. The ear plug 15 is connected to the housing 11 and is arranged to be insertable in the external auditory canal of a user for the user to wear the headset 10. The earplug 15 may be made of a material having elasticity, such as rubber or polyurethane. Thus, the comfort level of the user wearing the earphone 10 can be improved, the fitting degree between the earplug 15 and the external auditory canal of the user can be increased, and the using effect of the earphone 10 is further increased.

Further, the speaker module 12 is fixedly disposed in the accommodating cavity 111, and can divide the accommodating cavity 111 into a front sound cavity 112 and a rear sound cavity 113. Wherein, the front sound cavity 112 is communicated with the sound outlet channel 1111 and further communicated with the external environment; the battery 13 and the main board 14 may be fixedly disposed in the rear acoustic chamber 113. Taking the music sound as an example, the front sound cavity 112 mainly affects the middle-high frequency part of the music sound, and the rear sound cavity 113 mainly affects the low frequency part of the music sound; while the low frequency part of the music sound has a large influence on the sound quality. Generally, the lower frequency peaks in the frequency response curve are more left, the more prominent the bass sounds, and the subjectively perceived musical sounds are more pleasant. Therefore, the volume of the rear sound chamber 113 should be as large as possible so that the low frequency peaks in the frequency response curve are constantly shifted to the left, thereby constantly improving the low frequency characteristics of the musical sound and making the musical sound more pleasant to hear.

Illustratively, the housing 11 may include a front case 114 and a rear case 115 snap-fitted to the front case 114. The front housing 114 may be cylindrical and provided with a ring-shaped platform for supporting the speaker module 12. The speaker module 12 may be fixedly supported on a circular platform to form a front acoustic chamber 112 in cooperation with a front housing 114. Wherein, sealing elements such as foam, silica gel, sealant and the like can be arranged between the loudspeaker module 12 and the annular bearing platform. Based on this, the rear housing 115 may also be disposed in a cylindrical shape, and may be assembled with the front housing 114 by one or a combination of assembling methods such as clamping, adhesive bonding, and screw connection, and further cooperate with the front housing 114 and the speaker module 12 to form the rear acoustic cavity 113.

Referring to fig. 3 and 4 together, fig. 3 is a schematic structural diagram of an embodiment of the speaker module in fig. 1, and fig. 4 is a schematic cross-sectional structural diagram of the speaker module in fig. 3.

Based on the above description, the speaker module 12 may be any one of an electrodynamic type, a capacitive type, an electromagnetic type, a piezoelectric type, and the like. In the present embodiment, the speaker module 12 is taken as a moving-coil speaker for exemplary explanation. Further, the speaker module 12 may be arranged in a regular shape such as a cylinder, a cube, or other irregular shapes.

Referring to fig. 3 and 4, the speaker module 12 may include a bracket 121, a magnet 122, a diaphragm 123, and a coil 124. The support 121 may be a cylindrical structure with one end open, for example, one end of the support 121 facing the sound emitting direction of the speaker module 12 is arranged in an open shape, so as to facilitate assembling the speaker module 12. The magnet 122 may be a permanent magnet, and may be fixed to the bottom of the bracket 121. Wherein, the inner wall of the bracket 121 can be coated with a soft magnetic material layer; and a gap is left between the side wall of the magnet 122 and the inner wall of the holder 121 in the radial direction of the holder 121, thereby forming a magnetic gap. The diaphragm 123 may cover the open end of the support 121 and may seal the open end of the support 121. The coil 124 may be fixed to a side of the diaphragm 123 facing the magnet 122, and may extend into a magnetic gap between the magnet 122 and the bracket 121. Based on this, when the coil 124 is energized, the magnetic field formed by the magnet 122 generates mechanical vibration, and further forms sound waves, that is, converts electrical signals into acoustic signals.

It should be noted that: referring to fig. 2, the sound emitting direction of the speaker module 12 may be a direction pointing from the rear sound chamber 113 to the front sound chamber 112. In this regard, the sound emitting direction toward the speaker module 12 described in the present application may also refer to a direction toward the front sound cavity 112. Further, the vibration system described herein may include a magnet 122, a diaphragm 123, and a coil 124. Since the diaphragm 123 is much weaker than other structures of the speaker module 12, the front protecting cover 126 described later can also protect the diaphragm 123 from being punctured by a foreign object.

Illustratively, the speaker module 12 may further include a reinforcement ring 125, and the hardness of the reinforcement ring 125 is greater than that of the diaphragm 123. The reinforcing ring 125 and the diaphragm 123 may be connected by gluing, or may be an integral structural member formed by injection molding of a metal insert. Further, the open end of the support 121 may be provided with an annular support 1211, and the diaphragm 123 may be fixed on the annular support 1211 through the reinforcement ring 125. At this time, the edge of the diaphragm 123 may be clamped between the reinforcement ring 125 and the annular stop 1211, thereby increasing the reliability of the connection between the diaphragm 123 and the bracket 121.

Further, the speaker module 12 may further include a front cover 126, and the front cover 126 may cover the open end of the bracket 121. The front cover 126 has a hardness greater than that of the diaphragm 123, and has a plurality of through holes. Thus, for the speaker module 12, the front cover 126 can effectively protect the diaphragm 123 from being punctured by a foreign object, thereby increasing the reliability of the speaker module 12.

Generally, when the diaphragm 123 vibrates to form a sound wave, the sound wave propagates both forward and backward; while the forward and backward propagating sound waves are in antiphase. When the frequency of the sound wave is low, the propagation of the sound wave has a strong diffraction capability and almost no directivity, so that the sound wave propagating backward can be diffracted to the front of the diaphragm 123, and the sound at a point in front of the diaphragm 123 is a combination of the sound wave propagating backward and the sound wave propagating forward. The two sound waves have opposite phases, so that the sound pressure of the synthesized sound at the point is reduced and even is zero, and the sound cannot be heard, which is called as an acoustic short circuit. Based on this, in this embodiment, the speaker module 12 may further be provided with an acoustic short circuit hole for communicating the front acoustic chamber 112 and the rear acoustic chamber 113. Wherein, the sound short circuit hole mainly utilizes the coherent cancellation principle of sound wave, and the phase place of sound wave is opposite promptly, and after the stack, the amplitude reduces to improve the acoustics performance of earphone 10, especially the low frequency characteristic of sound, and then make sound listen to more balanced, and make the vibrating diaphragm 123 vibration more harmonious, possess better transient state effect, avoid vibrating diaphragm 123 to appear the abnormal sound at the wearing in-process of earphone 10.

It should be noted that: the casing 11 may further have a pressure relief hole communicated with the rear acoustic cavity 113, and the pressure relief hole enables the rear acoustic cavity 113 to be communicated with an external environment, that is, air can freely enter and exit the rear acoustic cavity 113. In this way, the sound pressure of the rear acoustic cavity 113 can be changed along with the vibration of the diaphragm 123, so that the change of the air pressure in the front acoustic cavity 112 can be prevented by the rear acoustic cavity 113 as much as possible, thereby improving the acoustic performance of the earphone 10, especially the low-frequency characteristics of the sound.

Illustratively, the front protective cover 126 may include a body portion 1261 and a flange portion 1262 connected to the body portion 1261. Here, the flange portion 1262 is provided on the outer periphery of the main body portion 1261, and is provided with an acoustic short-circuit hole 1263. Thus, when the front cover 126 covers the opening end of the support 121, the main body portion 1261 can cover the diaphragm 123 to protect the vibration system (mainly, the diaphragm 123); the front and rear acoustic chambers 112 and 113 may then communicate through acoustic shorting holes 1263 to achieve coherent cancellation and improve the low frequency characteristics of the sound. Furthermore, since the acoustic short-circuit hole 1263 is formed in the edge of the front cover 126, a through hole for realizing acoustic short-circuit does not need to be formed in other structures of the speaker module 12, so that the speaker module has good universality, the design difficulty of the speaker module 12 is reduced to a certain extent, and the production cost is reduced; moreover, the front cover 126 is originally provided with through holes for transmitting sound waves, and the acoustic short-circuit hole 1263 can be formed together with the through holes in one process without adding extra processes, so that the production efficiency is improved, and the production cost is reduced. In addition, because the acoustic short-circuit hole 1263 is formed in the edge of the front cover 126, the vibration area of the vibration system (mainly, the vibrating diaphragm 123) is not reduced by forming a through hole for realizing the acoustic short-circuit, thereby being beneficial to ensuring the original acoustic effect of the speaker module 12.

It should be noted that: a plurality of flange portions 1262 may be provided along the circumferential direction of the body portion 1261, and the plurality of flange portions 1262 may be evenly distributed along the circumferential direction of the body portion 1261. For example, two flange portions 1262 are provided, and the two flange portions 1262 are provided to face each other in the radial direction of the body portion 1261. For another example, three flange portions 1262 are provided, and a line connecting geometric centers of orthographic projections of the three flange portions 1262 on a plane on which the main body portion 1261 is located is a regular triangle. Accordingly, each flange portion 1262 may have a plurality of acoustic short circuit holes 1263 formed therein to provide both structural strength of the flange portion 1262 and a total opening area of the acoustic short circuit holes 1263. Further, the sound short-circuit hole 1263 may be covered with a tuning piece, and the tuning piece is mainly used for adjusting the ventilation amount of the sound short-circuit hole 1263. Wherein, the tuning piece can be tuning cotton, screen cloth, sound resistance net etc..

Further, the main body portion 1261 may include a central arch portion 12611 and a rim connecting portion 12612 integrally connected, the rim connecting portion 12612 may surround the central arch portion 12611, and the central arch portion 12611 is arched, e.g., dome-shaped, compared to the rim connecting portion 12612. In this way, when the front protecting cover 126 covers the opening end of the support 121, the edge connecting portion 12612 may be fixed on the annular support 1211, and the middle arched portion 12611 may be arched in a direction away from the vibration system (e.g., the diaphragm 123), so that a gap is left between the front protecting cover 126 and the diaphragm 123, so that the front protecting cover 126 does not interfere with the vibration of the diaphragm 123 while protecting the diaphragm 123. However, based on the above description, the edge connecting portion 12612 may be fixed to the reinforcing ring 125, and the flange portion 1262 may be connected to the edge connecting portion 12612.

Further, one of the annular rim 1211 and the rim connecting portion 12612 may be provided with the fool-proof protrusion 12613, and the other may be provided with the fool-proof groove 1212 to be fitted with the fool-proof protrusion 12613. Thus, when the front protecting cover 126 covers the opening end of the bracket 121, the fool-proof protrusion 12613 can be inserted into the fool-proof groove 1212 to perform the assembling positioning, so that the front protecting cover 126 can be assembled with the bracket 121 in a correct manner. In the present embodiment, the fool-proof protrusion 12613 is disposed on the edge connecting portion 12612, and the fool-proof groove 1212 is disposed on the annular cap 1211 for an exemplary illustration. Further, the fool-proof protrusion 12613 and the fool-proof groove 1212 may extend in a radial direction of the bracket 121, which eliminates the need to increase the thickness of the front protective cover 126.

Referring to fig. 5 to 8 together, fig. 5 is a schematic structural view of an embodiment of the front protective cover of fig. 3, fig. 6 is a schematic structural view of another embodiment of the front protective cover of fig. 3, fig. 7 is a schematic structural view of another embodiment of the front protective cover of fig. 3, and fig. 8 is a schematic structural view of yet another embodiment of the front protective cover of fig. 3.

Referring to fig. 5 and 4, the surface of the flange portion 1262 may be perpendicular to the central axis of the bracket 121. At this time, the surface of the flange portion 1262 may be coplanar with the surface of the edge connecting portion 12612, so as to simplify the structure of the front guard plate 126 and reduce the production cost.

Referring to fig. 6 and 4, flange portion 1262 may be bent with respect to main body portion 1261, that is, a surface on which flange portion 1262 is located may be inclined with respect to a central axis of bracket 121. Specifically, the flange portion 1262 may be bent toward the rear acoustic cavity 113 with respect to the main body portion 1261, that is, toward a direction opposite to the sound emitting direction of the speaker module 12. Here, the inclination angle (e.g., θ 1) of the flange portion 1262 with respect to the central axis of the bracket 121 may be greater than or equal to 30 degrees.

Referring to fig. 7 and 4, flange portion 1262 may be bent with respect to main body portion 1261, that is, a surface on which flange portion 1262 is located may be inclined with respect to a central axis of bracket 121. Specifically, the flange portion 1262 may be bent toward the front acoustic chamber 112 with respect to the main body portion 1261, that is, toward the sound emitting direction of the speaker module 12. Here, an inclination angle (e.g., θ 2) of the flange portion 1262 with respect to the central axis of the bracket 121 may be less than or equal to 60 degrees.

Referring to fig. 8 and 4, the front cover 126 may further include a transition portion 1264 connecting the main body portion 1261 and the flange portion 1262, and the transition portion 1264 is bent toward the rear sound cavity 113 with respect to the main body portion 1261, that is, toward the opposite direction of the sound emitting direction of the speaker module 12; the flange portion 1262 is bent away from the central axis of the bracket 121, i.e., away from the main body portion 1261, with respect to the transition portion 1264. Wherein the transition portion 1264 may extend along the outer side wall of the bracket 121, so that the front cover 126 may further protect the side of the speaker module 12. In this case, the surface of the flange portion 1262 may be perpendicular to the central axis of the bracket 121, similarly to fig. 5; or may be inclined with respect to the central axis of the bracket 121, similar to fig. 6 or 7, and will not be described herein.

The above description is only a part of the embodiments of the present application, and not intended to limit the scope of the present application, and all equivalent devices or equivalent processes performed by the content of the present application and the attached drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. The utility model provides a front protecting cover for the lid is established on the speaker module, in order to protect the vibration system of speaker module, its characterized in that, front protecting cover include the main part and with the flange portion that the main part is connected, flange portion sets up the periphery of main part to be equipped with the sound short circuit hole.

2. The front protective cover of claim 1, wherein the flange portion is disposed in a bent shape with respect to the main body portion.

3. The front cover of claim 2, wherein the flange portion is bent with respect to the main body portion toward a direction opposite to a sound emitting direction of the speaker module.

4. The front cover of claim 3, wherein an inclination angle of the flange portion with respect to a sound emitting direction of the speaker module is greater than or equal to 30 degrees.

5. The front cover of claim 1, further comprising a transition portion connecting the main body portion and the flange portion, the transition portion being bent with respect to the main body portion toward a direction opposite to a sound emitting direction of the speaker module, and the flange portion being bent with respect to the transition portion toward a direction away from the main body portion.

6. The front cover as claimed in claim 1, wherein the acoustic short hole cover is provided with a tuning member.

7. A loudspeaker module, characterized in that, the loudspeaker module includes support, vibration system and the preceding protecting cover of any one of claims 1-6, the support is towards the one end of the sound direction of loudspeaker module and is the setting of opening form, the vibration system sets up in the support, preceding protecting cover covers establishes the open end at the support.

8. The speaker module as claimed in claim 7, wherein the opening end of the bracket is provided with an annular platform, the main body portion comprises an integrally connected middle arch portion and an edge connecting portion, the edge connecting portion surrounds the middle arch portion and is fixed on the annular platform, the middle arch portion is arched in a direction away from the vibration system, and the flange portion is connected with the edge connecting portion.

9. The speaker module as claimed in claim 8, wherein one of the annular platform and the edge connection portion is provided with a fool-proof protrusion, and the other is provided with a fool-proof groove cooperating with the fool-proof protrusion, and the fool-proof protrusion is inserted into the fool-proof groove.

10. An earphone, comprising a housing and a speaker module according to any one of claims 7-9, wherein the housing has a receiving cavity and a sound outlet channel, the speaker module is disposed in the receiving cavity and divides the receiving cavity into a front sound cavity and a rear sound cavity, the front sound cavity is communicated with the sound outlet channel, and the front sound cavity is communicated with the rear sound cavity through the sound short-circuit hole.

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