CN111954130B

CN111954130B - Sound production monomer and sound production device

Info

Publication number: CN111954130B
Application number: CN202010917101.0A
Authority: CN
Inventors: 王建建; 王继宗
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2022-03-25
Anticipated expiration: 2040-09-03
Also published as: CN111954130A

Abstract

The invention discloses a sounding monomer and a sounding device, wherein the sounding monomer is arranged in a shell with a cavity and is used for dividing the cavity into a front cavity and a rear cavity; the sounding monomer is including the basin frame that has accommodating space, locate installed part on the basin frame and locating vibration system and magnetic circuit in the accommodating space, seted up the air channel intercommunication on the installed part the ante-chamber with accommodating space, seted up on the basin frame and revealed the hole intercommunication back chamber with accommodating space. The sounding unit and the sounding device disclosed by the invention can balance the air pressure of the front cavity and the rear cavity, reduce or eliminate the uncomfortable feeling of a user and improve the tone quality of the sounding unit.

Description

Sound production monomer and sound production device

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a sounding unit and a sounding device.

Background

Earphones are widely used in modern consumer electronics. In order to improve the tone quality effect felt by a user and reduce the influence of external environment sound, the tightness between the existing earphone and the ear of the user is increased by increasing a sealing structure. When a user wears the earphone, air compression in the auditory canal of the user can be caused, so that the air pressure in the auditory canal is increased, the user feels uncomfortable, and particularly the discomfort of the in-ear earphone is obvious.

Therefore, it is desirable to provide a new sound generation device to solve the above technical problems.

Disclosure of Invention

The invention mainly aims to provide a sound production unit and a sound production device, and aims to solve the technical problem of discomfort caused by increase of air pressure in an ear canal when a user wears an earphone.

In order to achieve the purpose, the sound production device provided by the invention is characterized in that the sound production unit is arranged in a shell with a cavity and is used for dividing the cavity into a front cavity and a rear cavity; the sounding monomer is including the basin frame that has accommodating space, locate installed part on the basin frame and locating vibration system and magnetic circuit in the accommodating space, seted up the air channel intercommunication on the installed part the ante-chamber with accommodating space, seted up on the basin frame and revealed the hole intercommunication back chamber with accommodating space.

Preferably, the installed part includes the collar and certainly the collar is far away from the protruding board that the voice coil loudspeaker voice coil direction of vibration system extends, protruding board is located on the basin frame, vibration system's vibrating diaphragm holding in on the collar, the through-hole has been seted up to the protruding board, the collar with basin frame interval sets up and forms the clearance of ventilating, the through-hole with the clearance intercommunication of ventilating forms the passageway of ventilating.

Preferably, the mounting ring includes an abutting portion and a notch portion connected to each other, the notch portion is connected to the protruding plate, the notch portion is suspended on the frame, and the ventilation gap is formed between the notch portion and the frame.

Preferably, the abutting portion and one end of the notch portion close to the diaphragm are on the same plane, and the thickness of the abutting portion is greater than that of the notch portion along the vibration direction of the diaphragm.

Preferably, the basin frame includes the basin frame main part and the protrusion set up in the assembly ear of basin frame main part, the collar is located in the basin frame main part, the protrusion board is located on the assembly ear.

Preferably, the vibration system further comprises a flexible circuit board arranged between the basin frame and the mounting part, the flexible circuit board is electrically connected with an external circuit and the voice coil, and a hollow area is formed in the flexible circuit board and communicated with the ventilation gap and the accommodating space.

Preferably, the flexible circuit board comprises a first electric connection end arranged on the assembling lug, a second electric connection end connected with the voice coil, and a cantilever connected with the first electric connection end and the second electric connection end, and the first electric connection end, the cantilever and the second electric connection end are encircled to form the hollow area.

Preferably, the sounding device further comprises a damping sheet arranged on the basin frame, and the damping sheet covers part of the leakage hole.

Preferably, the number of the vent channels is multiple, and the vent channels are arranged in pairs in an opposite mode.

The invention also provides a sounding device which comprises a shell with a cavity and the sounding monomer, wherein the sounding monomer divides the cavity into a front cavity and a rear cavity.

According to the invention, the front cavity and the rear cavity are communicated by adopting the ventilation channel, so that the air pressure between the front cavity and the rear cavity can be balanced, and an acoustic short-circuit effect is generated; due to the fact that air in the ear canal is compressed when the earphone is worn, discomfort of a user is caused, and the air pressure between the earphone and the eardrum can be reduced or removed by the fact that the front cavity and the rear cavity are communicated through the ventilation channel, so that the discomfort of the user is relieved or removed; the ventilation channel is communicated with the front cavity and the rear cavity, so that external sound can pass through the rear cavity and the front cavity to reach the eardrum, and the transparent mode operation of the earphone is realized; the front cavity is communicated with the rear cavity through the ventilation channel, so that active noise reduction debugging is facilitated.

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 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 view of a disassembled structure of a sounding unit according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a sounding unit according to an embodiment of the present invention;

FIG. 3 is a schematic view of another embodiment of the sound generating unit of the present invention;

fig. 4 is a schematic cross-sectional structure view of another embodiment of the sound generating unit of the present invention.

Examples reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Sound monomer	1	Basin rack
111	Basin stand main body	11	Side wall
				113	Connecting part	114	Leakage hole
115	Mounting part	113	Assembling ear
				3	Vibration system	19	Bump
311	Ball top	31	Vibrating diaphragm
				315	Fixing part	111	Folded ring part
32	Hollowed-out area	33	Voice coil
				351	First electric connection terminal	35	Flexible circuit board
355	Cantilever arm	353	Second electric connecting terminal
						5	Magnetic circuit system
51	Magnetic yoke	511	Base plate
				512	Clamping groove	513	Side plate
52	Magnetic gap	53	Main magnetic steel
				55	Magnetic conductive plate	7	Damping fin
9	Mounting member	91	Mounting ring
				911	Abutting part	913	Notch part
92	Through hole	93	Convex plate
				94	Ventilation gap	2	Accommodating space

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, 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 movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a sounding single body 10.

Referring to fig. 1 and 2, in the sound generating unit 10 according to the technical solution of the present invention, the sound generating unit 10 is arranged in a housing having a cavity, and is used for dividing the cavity into a front cavity and a rear cavity; the sounding monomer 10 includes the basin frame 1 that has accommodating space 2, locates mounting part 9 on the basin frame 1 and locating vibration system 3 and magnetic circuit 5 in the accommodating space 2, set up the air channel intercommunication on the mounting part 9 the ante-chamber with accommodating space 2, set up on the basin frame 1 and let out the hole 14 intercommunication back the chamber with accommodating space 2.

In this embodiment, the magnetic circuit system 5 includes a magnetic yoke 51 matching with the basin frame 1, a main magnetic steel 53 spaced from the magnetic yoke 51 to form a magnetic gap 52, and a magnetic conductive plate 55 disposed on the main magnetic steel 53, the vibration system 3 includes a diaphragm 31 fixed on the basin frame 1 or the mounting member 9, and a voice coil 33 driving the diaphragm 31 to vibrate, and the voice coil 33 is inserted into the magnetic gap 52. Under the action of the magnetic field generated by the magnetic circuit system 5, the voice coil 33 vibrates after being energized, thereby driving the diaphragm 31 to vibrate and sound. Of course, in other embodiments, the magnetic circuit system 5 and the vibration system 3 may have other structures to realize vibration sound production.

When vibrating diaphragm 31 sound production vibration, the air in basin frame 1 is compressed by the vibration of vibrating diaphragm 31, and accessible leakage hole 14 balances vibrating diaphragm 31 rear side space atmospheric pressure, and vibrating diaphragm 31 rear side is the one side that vibrating diaphragm 31 connects voice coil 33, realizes the atmospheric pressure balance between back chamber and the accommodating space 2 to make things convenient for vibrating diaphragm 31 to vibrate, improve tone quality. Through setting up the passageway intercommunication of ventilating the ante-chamber with accommodating space 2, set up leakage hole 14 intercommunication the back chamber with accommodating space 2 to make the sound wave that vibrating diaphragm 31 vibration produced can loop through ventilating channel, accommodating space 2 and leakage hole 14 and get into the back chamber from the ante-chamber, the sound wave that vibrating diaphragm 31 vibration produced can loop through leakage hole 14, accommodating space 2 and ventilating channel and get into the ante-chamber from the back chamber, two opposite directions of sound wave promptly, make partial sound wave offset, produce the acoustic short circuit effect, reach the purpose of adjusting the frequency response.

According to the invention, the front cavity is communicated with the accommodating space 2 by adopting the ventilation channel, and the rear cavity is communicated with the accommodating space 2 by the leakage hole 14, so that the air pressure between the front cavity and the rear cavity can be balanced, and an acoustic short-circuit effect is generated; due to the fact that air in the ear canal is compressed when the earphone is worn, discomfort of a user is caused, the front cavity is communicated with the accommodating space 2 through the ventilation channel, and the air pressure between the earphone and the eardrum can be reduced or removed through the communication between the rear cavity and the accommodating space 2 through the leakage hole 14, so that the discomfort of the user is relieved or removed; the ventilation channel is communicated with the front cavity and the accommodating space 2, and the leakage hole 14 is communicated with the rear cavity and the accommodating space 2, so that external environment sound can pass through the rear cavity and the front cavity to reach the eardrum, and the transparent mode operation of the earphone is realized; the front cavity is communicated with the rear cavity through the ventilation channel, so that active noise reduction debugging is facilitated.

The mounting part 9 comprises a mounting ring 91 and a protruding plate 93 extending from the mounting ring 91 to a direction away from the voice coil 33 of the vibration system 3, the protruding plate 93 is arranged on the basin frame 1, the diaphragm 31 of the vibration system 3 is fixed on the mounting ring 91, the protruding plate 93 is provided with a through hole 92, the mounting ring 91 and the basin frame 1 are arranged at intervals to form a ventilation gap 94, and the through hole 92 and the ventilation gap 94 are communicated to form the ventilation channel. The through holes 92 are communicated with two opposite sides of the protruding plates 93, when the protruding plates 93 are arranged on the basin stand 1, one ends of the through holes 92 are sealed by the basin stand 1, and the air gaps 94 formed between the mounting rings 91 and the basin stand 1 are communicated with one ends of the through holes 92 sealed by the basin stand 1 and the accommodating space 2. So that the air of the front cavity can enter the accommodating space 2 through the through hole 92 and the ventilation gap 94.

Further, the mounting ring 91 includes an abutting portion 911 and a notch portion 913 connected to each other, the notch portion 913 is connected to the projecting plate 93, the notch portion 913 is suspended on the bowl frame 1, and the air-vent gap 94 is formed between the notch portion 913 and the bowl frame 1. The abutting part 911 may be suspended on the frame 1 or abut against the frame 1. By providing the ventilation gap 94 corresponding to the projecting plate 93 between the notched portion 913 and the frame 1, the abutting portion 911 can be connected to the frame 1 so that only the through hole 92 communicates the front chamber and the housing space 2.

Still further, the abutting portion 911 and the notch portion 913 are located on the same plane near one end of the diaphragm 31, and the thickness of the abutting portion 911 is larger than the thickness of the notch portion 913 in the vibration direction of the diaphragm 31. That is, the notch 913 can be made thinner than the other portions of the attachment ring 91, so that the ventilation gap 94 is formed between the notch 913 and the frame 1 when the attachment ring 91 is mounted on the frame 1.

Further, the basin stand 1 comprises a basin stand main body 11 and assembling ears 13 protruding from the basin stand main body 11, the mounting ring 91 is arranged on the basin stand main body 11, and the protruding plates 93 are arranged on the assembling ears 13. The frame main body 11 is matched with the magnetic circuit system 5, namely the vibration system 3 and the magnetic circuit system 5 are arranged in the frame main body 11, and the outer surfaces of the assembly lugs 13 are contacted with the shell. Through setting up assembly ear 13 for protruding board 93 can locate on basin frame 1 through assembly ear 13, the structure of basin frame main part 11 simultaneously can only increase assembly ear 13 compared in the basin frame structure among the prior art, further makes the structure of locating vibration system 3 and magnetic circuit 5 in basin frame main part 11 can not make the change compared in the sound production monomer among the prior art.

Referring to fig. 3 and 4, the vibration system 3 further includes a flexible circuit board 35 disposed between the frame 1 and the mounting member 9, the flexible circuit board 35 is electrically connected to an external circuit and the voice coil 33, and a hollow area 32 is formed on the flexible circuit board 35 to communicate the air gap 94 and the accommodating space 2. It will be understood by those skilled in the art that the vibration system 3 may be connected to an external circuit through voice coil leads without the flexible circuit board 35. When flexible line way board 35 was the power supply of voice coil 33, can play spacing voice coil 33 along the vibration effect of predetermineeing the direction, improved tone quality. In this embodiment, the flexible circuit board 35 is attached to the basin stand 1, i.e., a portion of the flexible circuit board 35 may be disposed in the vent gap 94.

Further, the flexible circuit board 35 includes a first electrical connection terminal 351 disposed on the mounting ear 13, a second electrical connection terminal 353 connected to the voice coil 33, and a cantilever 355 connecting the first electrical connection terminal 351 and the second electrical connection terminal 353, wherein the first electrical connection terminal 351, the cantilever 355 and the second electrical connection terminal 353 surround the hollow area 32. The number and shape of the cantilevers 355 are not limited in the present invention, and the flexible circuit board has a certain elasticity by providing the cantilevers 355, which is advantageous for limiting the vibration direction of the voice coil 33.

And still further. The leakage hole 14 is opened on the frame body 11. Specifically, basin stand main part 11 is including the lateral wall 111, connecting portion 113 and the installation department 115 that connect gradually, lateral wall 111 with magnetic circuit 5 looks adaptation, first electrical terminal 351 pastes and establishes the installation department 115 with between the protruding board 93. The side wall 111, the connecting portion 113 and the mounting portion 115 may form a step structure, so that a projection of the yoke 51 fitted to the side wall 111 falls on the diaphragm 31 along the vibration direction of the voice coil 33, and the diaphragm 31 may vibrate between the front cavity and the connecting portion 113, which is beneficial for the vibration and sound production of the diaphragm 31. The connecting portion 113 extends from one end of the sidewall 111 close to the diaphragm 31 in a direction away from the magnetic circuit system 5, the mounting portion 115 extends from the connecting portion 113 in a direction close to the diaphragm 31, and the leakage hole 14 is opened in the connecting portion 113. In the present embodiment, the frame 1 is circular, the side wall 111, the connecting portion 113 and the mounting portion 115 are coaxially disposed, and the diameter of the side wall 111 is smaller than that of the mounting portion 115. The air in the rear chamber may directly pass through the leakage hole 14 on the connection portion 113 in the vibration direction of the voice coil 33.

In another embodiment, the sound production device 10 further comprises a damping plate 7 disposed on the basin frame 1, wherein the damping plate 7 covers at least a partial area of one of the leakage holes 14. The damper 7 may be attached to the connection portion 113, or may be provided on the connection portion 113 by welding or the like. The person skilled in the art can use damping fins 7 of different materials according to different user requirements, or adjust the area of the damping fin 7 covering the leakage hole 14, so as to adjust the size of the communication area between the rear cavity and the accommodating space 2, thereby realizing the tone quality adjustment. It can be understood by those skilled in the art that the number of the leakage holes 14 may be plural, when the number of the damping fin 7 is one, one damping fin 7 may only shield a partial region of one leakage hole 14, or may shield partial regions of a plurality of leakage holes 14 respectively by one damping fin 7, one damping fin 7 may completely shield one leakage hole 14, or one damping fin 7 may completely shield a plurality of leakage holes 14; when the number of the damper pieces 7 is plural, the damper pieces 7 may be provided for each of the leak holes 14, each of the damper pieces 7 may shield a partial region of one of the leak holes 14, and each of the damper pieces 7 may completely shield each of the leak holes 14.

In one embodiment, the number of the vent channels is multiple, and the vent channels are arranged in pairs. In this embodiment, the number of the ventilation channels is 2, the number of the protruding plates 93 is 2, and the 2 ventilation channels are respectively disposed on the protruding plates 93 which are oppositely disposed. The ventilation channels are arranged in pairs in an opposite mode, so that airflow flowing balance on two opposite sides of the sounding single body 10 is facilitated. It will be understood by those skilled in the art that the number of the leakage holes 14 may also be plural, and a plurality of the leakage holes 14 are oppositely arranged in pairs to balance the airflow flowing on the two opposite sides of the sound generating unit 10, and in this embodiment, the leakage holes 14 are arc-shaped grooves which are arranged along the curved connecting portion 113.

In this embodiment, the diaphragm 31 includes a top portion 311, a corrugated portion 313 and a fixing portion 315, which are sequentially connected from inside to outside, and the fixing portion 315 is connected to the mounting ring 91. The fixing part 315 is connected with the mounting ring 91, so that the diaphragm 31 can be fixed on the frame 1, and the through hole 92 is exposed and communicated with the front cavity.

The magnetic circuit system 5 comprises a magnetic yoke 51 matched with the frame body 11, a main magnetic steel 53 separated from the magnetic yoke 51 to form a magnetic gap 52, and a magnetic conductive plate 55 arranged on the main magnetic steel 53. The magnetic yoke 51 comprises a bottom plate 511 and a side plate 513 bent and extended from the bottom plate 511, the main magnetic steel 53 is attached to the bottom plate 511, and the side wall 111 is sleeved outside the side plate 513. In the embodiment shown in fig. 3, the frame body 11 further includes a protrusion 19 connected to the side wall 111, the yoke 51 is provided with a slot 512 adapted to the protrusion 19, and the yoke 51 is connected to the frame body 11 by engaging the protrusion 19 with the slot 512.

The invention also provides a sounding device which comprises a shell with a cavity and the sounding single body 10, wherein the sounding single body 10 divides the cavity into a front cavity and a rear cavity. The specific embodiment of the sound generating device of the present invention is substantially the same as the above embodiments of the sound generating unit 10, and will not be described herein. The sound generating device may be a headphone, an in-ear headphone or the like.

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

Claims

1. The sounding unit is characterized in that the sounding unit is arranged in a shell with a cavity and is used for dividing the cavity into a front cavity and a rear cavity; the sounding unit comprises a basin frame with an accommodating space, a mounting piece arranged on the basin frame, and a vibration system and a magnetic circuit system which are arranged in the accommodating space, wherein the mounting piece is provided with a ventilation channel for communicating the front cavity with the accommodating space, and the basin frame is provided with a leakage hole for communicating the rear cavity with the accommodating space;

the mounting part comprises a mounting ring and a protruding plate, the protruding plate extends towards the voice coil of the vibration system from the mounting ring to the far away direction, the protruding plate is arranged on the basin frame, the vibration diaphragm of the vibration system is fixed on the mounting ring, the protruding plate is provided with through holes, the mounting ring and the basin frame are arranged at intervals to form ventilation gaps, and the through holes are communicated with the ventilation gaps to form the ventilation channels.

2. The sound generating unit according to claim 1, wherein the mounting ring includes an abutting portion and a notch portion connected to the protruding plate, the notch portion is suspended from the frame, and the vent gap is formed between the notch portion and the frame.

3. The sounding unit according to claim 2, wherein the abutting portion and the end of the notch portion close to the diaphragm are on the same plane, and the thickness of the abutting portion is greater than that of the notch portion along the vibration direction of the diaphragm.

4. The sounding unit according to claim 2, wherein the frame comprises a frame body and assembling ears protruding from the frame body, the mounting ring is disposed on the frame body, and the protruding plates are disposed on the assembling ears.

5. The sounding unit as claimed in claim 4, wherein the vibration system further includes a flexible printed circuit board disposed between the frame and the mounting member, the flexible printed circuit board electrically connects the external circuit and the voice coil, and a hollow area is formed on the flexible printed circuit board to communicate the ventilation gap and the receiving space.

6. The sounding unit according to claim 5, wherein the flexible circuit board comprises a first electrical connection terminal disposed on the mounting lug, a second electrical connection terminal connected to the voice coil, and a cantilever connecting the first electrical connection terminal and the second electrical connection terminal, and the first electrical connection terminal, the cantilever, and the second electrical connection terminal define the hollow area.

7. The sounding unit according to claim 2, wherein the sounding device further comprises a damper disposed on the frame, wherein the damper covers at least a partial area of one of the leakage holes.

8. The sound generating unit according to any one of claims 1 to 7, wherein the number of the vent channels is plural, and the plural vent channels are arranged opposite to each other in pairs.

9. A sound-producing device comprising a housing having a cavity and a sound-producing monomer according to any one of claims 1 to 8, the sound-producing monomer dividing the cavity into a front chamber and a rear chamber.