CN114025277A

CN114025277A - Acoustic valve and in-ear speaker

Info

Publication number: CN114025277A
Application number: CN202111440142.6A
Authority: CN
Inventors: 丁松森
Original assignee: Zhongke Shengtemei Suzhou Acoustic Technology Co ltd
Current assignee: Zhongke Shengtemei Suzhou Acoustic Technology Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-02-08

Abstract

The invention discloses an acoustic valve and an in-ear speaker, the acoustic valve includes: a housing provided with an air flow passage communicating an inside and an outside thereof; a valve seat fixed relative to the housing, the airflow passage passing through the valve seat; the valve core assembly comprises a magnet movably arranged in the shell and an elastic piece connected between the shell and the magnet; the limiting pieces are fixed relative to the shell and are respectively positioned on two sides of the magnet together with the valve seat; and a coil configured to generate a magnetic field when energized; the magnet has with the disk seat magnetic attraction is in order to close the first position of air flow channel and with the locating part magnetic attraction is in order to open the second position of air flow channel, the coil passes through its magnetic field drive that produces the magnet is in first position with switch between the second position. The acoustic valve can conveniently open or close the airflow channel, and is more energy-saving.

Description

Acoustic valve and in-ear speaker

Technical Field

The present invention relates to an acoustic device, and more particularly, to an acoustic valve and an in-ear speaker.

Background

In-ear speakers, such as in-ear earphones and hearing aids, are required to be inserted into the ear canal of a person to form a sealed space therein during use. The in-ear speaker can reduce the interference of external noise to music, provides a closed environment, greatly reduces sound leakage, and has excellent acoustic performance effect.

However, the closed ear canal can generate an ear blocking effect, when a user speaks, the user feels that the speaking sound is loud and has echo, and serious ear blocking feeling even can cause dizziness, so that the using comfort and the acoustic quality of the in-ear speaker are affected.

In order to solve the above problem, the prior art can set the in-ear speaker to not form confined space with the duct, for example, set up the outside passageway with the duct of intercommunication, thereby alleviate or eliminate stifled ear effect, however, because duct and outside air circulation, the low frequency acoustic passageway exists always, the ANC effect of speaker can weaken or need rely on the sensitivity that the sound producing unit improves the low frequency greatly to strengthen ANC, the tone quality performance of speaker has been reduced, and high to the requirement of speaker sound producing unit, be unfavorable for reduce cost.

Still there is the technique that sets up the acoustics valve in order to improve acoustic effect in the pleasant formula speaker among the prior art, and the pleasant formula speaker is equipped with intercommunication duct and external passageway, and the acoustics valve setting is in the passageway, and it can open or close the passageway in needs, and when the passageway was opened, can communicate duct and external, the effect of eliminating stifled ear can make the duct form confined space when the passageway was closed, and acoustic effect is better. However, the conventional acoustic valve has a complicated structure, a large volume, a continuous energization in the opening and closing states of the passage, and a large noise generation at the time of switching.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

Disclosure of Invention

The invention aims to provide an acoustic valve and an in-ear speaker, wherein the acoustic valve can conveniently control the on-off of an airflow channel.

To achieve the above object, in one aspect, the present invention provides an acoustic valve including:

a housing provided with an air flow passage communicating an inside and an outside thereof;

a valve seat fixed relative to the housing, the airflow passage passing through the valve seat;

the valve core assembly comprises a magnet movably arranged in the shell and an elastic piece connected between the shell and the magnet;

the limiting pieces are fixed relative to the shell and are respectively positioned on two sides of the magnet together with the valve seat; and the number of the first and second groups,

a coil configured to generate a magnetic field when energized;

the magnet has with the disk seat magnetic attraction is in order to close the first position of air flow channel and with the locating part magnetic attraction is in order to open the second position of air flow channel, the coil passes through its magnetic field drive that produces the magnet is in first position with switch between the second position.

Furthermore, the housing is provided with a first through hole and a second through hole which are respectively positioned at two sides of the magnet, the airflow channel passes through the first through hole and the second through hole, and the magnet closes the airflow channel by sealing the first through hole at the first position.

Further, the valve seat is a part of the housing, and the first through hole is opened in the valve seat.

Further, the periphery of the limiting part is provided with at least one coil.

Further, the valve seat is arranged in the shell and connected with the shell, a third through hole communicated with the first through hole is formed in the valve seat, and when the valve seat is at the first position, the magnet is attracted with the valve seat and seals the third through hole.

Further, at least one coil is arranged on the periphery of the valve seat and/or the limiting piece.

Further, the elastic piece comprises an outer support fixed opposite to the shell, an inner support positioned in the center of the outer support and a spring arm connected between the outer support and the inner support, hollow holes are formed between the spring arm and the outer support and between the spring arm and the inner support, and the magnet is connected with the inner support.

Further, the inner support comprises a first surface facing the valve seat and a second surface facing the retainer; the magnet is connected to the first face; alternatively, the first and second electrodes may be,

the magnet is attached to the second face: alternatively, the first and second electrodes may be,

the magnet is embedded in the inner support.

Further, a first cushion pad is arranged on the valve seat and/or the valve core assembly, and in the first position, the valve core assembly and the valve seat are separated by the first cushion pad;

and a second cushion pad is arranged on the limiting piece and/or the valve core assembly, and the limiting piece and the valve core assembly are separated by the second cushion pad when the valve core assembly is in the second position.

Further, the magnet is driven to switch between the first position and the second position by applying voltages in different directions to the coil to generate magnetic fields in opposite directions; alternatively, the first and second electrodes may be,

the number of the coils is two, one of the two coils is used for generating a magnetic field for driving the magnet to be switched from the first position to the second position, and the other coil is used for generating a magnetic field for driving the magnet to be switched from the second position to the first position.

Further, when in the first position, a first attraction force exists between the magnet and the valve seat, and the elastic member applies a first elastic force to the magnet in a direction opposite to the first attraction force, wherein the first elastic force is smaller than the first attraction force;

when the second position, the magnet with the second actuation has between the locating part, the elastic component is right the magnet apply with second actuation opposite direction's second elasticity, the second elasticity is less than the second actuation.

Further, the elastic piece is made of a non-magnetic material.

In another aspect, the present invention also provides an in-ear speaker including an acoustic valve as described in any one of the above.

Compared with the prior art, the invention has the following beneficial effects:

1. by arranging the valve core assembly and the coil, the coil can be electrified to generate a magnetic field to drive the magnet to act to open or close the gas channel, the position switching is more convenient, meanwhile, after the position switching is finished, the magnet can be attracted with the valve seat or the limiting piece to be further kept at the first position or the second position, the coil does not need to be continuously electrified, the electric power can be saved, and the heating is reduced; in addition, the acoustic valve has simple structure and reliable action, and is beneficial to realizing miniaturization.

2. Through setting up the elastic component of connection between magnet and shell, can provide elasticity when switching the position of magnet to reduce the required magnetic force in switching position, can further improve energy-conserving effect, reduce calorific capacity, and make the position switch of magnet more smooth and easy and sensitive.

3. Through setting up first blotter and second blotter, can play buffering, shock attenuation and the effect of making an uproar of falling when switching position, prevent to send great noise because of the striking when switching position, use more comfortablely.

Drawings

Fig. 1 is a schematic view of the structure of an acoustic valve according to embodiment 1 of the present invention.

Figure 2 is an exploded view of the acoustic valve described in example 1 of the present invention.

Figure 3 is a schematic cross-sectional view of an acoustic valve according to example 1 of the present invention.

Figure 4 is a schematic cross-sectional view of an acoustic valve according to embodiment 1 of the present invention with the magnet in a first position.

Figure 5 is a schematic cross-sectional view of an acoustic valve according to embodiment 1 of the present invention with the magnet in a second position.

Fig. 6 is a schematic structural view of the elastic sheet of the present invention.

Fig. 7 is a schematic structural view of an acoustic valve according to embodiment 2 of the present invention.

Fig. 8 is an exploded view of an acoustic valve according to embodiment 2 of the present invention.

Fig. 9 is a schematic cross-sectional view of an acoustic valve according to embodiment 2 of the present invention.

Fig. 10 is a cross-sectional schematic view of an acoustic valve according to embodiment 2 of the present invention, with the magnet in a first position.

Fig. 11 is a schematic cross-sectional view of an acoustic valve according to embodiment 2 of the present invention, with the magnet in a second position.

Figure 12 is a schematic cross-sectional view of an acoustic valve according to example 3 of the present invention.

Figure 13 is a schematic cross-sectional view of an acoustic valve according to example 4 of the present invention.

Figure 14 is a cross-sectional schematic view of an acoustic valve according to example 5 of the present invention.

Fig. 15 is a schematic cross-sectional view of an acoustic valve according to embodiment 6 of the present invention.

Figure 16 is a cross-sectional schematic view of an acoustic valve according to example 7 of the present invention.

Fig. 17 is a schematic view of the in-ear speaker of the present invention positioned in the ear canal.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. 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 application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein 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 application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As shown in fig. 1 to 16, an acoustic valve according to a preferred embodiment of the present invention includes a housing 1, a valve seat 2, a valve core assembly 3, a retainer 4, and a coil 5.

The shape of the housing 1 is not limited, and as a preferred embodiment, the housing 1 is substantially cylindrical and has a hollow cavity 10, and the two ends of the housing 1 are a first end plate 11 and a second end plate 12 having a flat plate shape so as to facilitate mounting of other components. In other embodiments, the housing 1 may also be provided in a rectangular parallelepiped shape, a triangular prism shape, a spherical shape, or the like. The housing 1 is preferably formed by connecting a plurality of shells, and in the present embodiment, referring to fig. 2, the housing 1 includes an upper shell 1a and a lower shell 1b which are connected to each other.

The housing 1 is provided with a gas flow passage communicating the inside and outside thereof, the gas flow passage communicating from one side of the housing 1 to the other side of the housing 1, and preferably the gas flow passage communicating the opposite sides of the housing 1. Taking the case 1 shown in fig. 4 as an example, it has an upper side, a lower side, a left side and a right side, and the gas flow passage preferably communicates the upper side and the lower side thereof, but may communicate the upper side and the left side or the upper side and the right side of the case 1, and of course, may communicate with each other. Further, the housing 1 is provided with a first through hole 13 and a second through hole 14 which are respectively located at two sides of the valve core assembly 3, the first through hole 13 and the second through hole 14 are both communicated with the outside (outside the housing 1) and the cavity 10, and the airflow channel is communicated with the inside and the outside of the housing 1 through the first through hole 13 and the second through hole 14, so that when the acoustic valve is opened, the air at two ends of the acoustic valve can be communicated. As a preferred embodiment, the first through hole 13 is opened on the first end plate 11, and the second through hole 14 is opened on the second end plate 12, it is understood that the number of the first through hole 13 and the second through hole 14 is not limited to one, and may be 2, 3, 4 or more.

The valve seat 2 is relatively fixed with the housing 1, and the airflow passage passes through the valve seat 2, so that the airflow passage can be closed only by sealing the valve seat 2, and the airflow cannot pass through the acoustic valve. In the first preferred embodiment, as shown in fig. 1 to 5, the valve seat 2 is a part of the housing 1 (i.e., a part of the housing 1 is the valve seat 2), and more preferably, the valve seat 2 is the first end plate 11 (i.e., the first end plate 11 is the valve seat 2) or a part of the first end plate 11 (i.e., a part of the first end plate 11 is the valve seat 2), and the first through hole 13 is opened in the valve seat 2. In a second preferred embodiment, as shown in fig. 7 to 11, the valve seat 2 is a separate component or assembly, which is connected to the housing 1, and in this embodiment, the valve seat 2 is fixedly connected to the housing 1 by bonding or welding, and preferably, is connected to the inner surface of the first end plate 11, and the valve seat 2 is provided with a third through hole 20 communicating with the first through hole 13, and the outer circumferential surface thereof surrounds the first through hole 13 to prevent leakage between the valve seat 2 and the first through hole 13, so that the air flow passage can be closed by sealing the third through hole 20.

The valve core assembly 3 comprises a magnet 30 movably arranged in the housing 1 and an elastic member 31 connected between the housing 1 and the magnet 30, wherein the magnet 30 has magnetism and can attract magnetic conductive materials containing materials such as iron, cobalt, nickel and the like, and the elastic member 31 can apply elastic force to the magnet 30 when the magnet 30 deviates from a balance position of the magnet, so that the magnet 30 has a tendency to return to the balance position of the elastic member 31, wherein the balance position refers to a position when the elastic member 31 is not elastically deformed, and fig. 3 and 9 show a state when the elastic member 31 is in the balance position.

The elastic member 31 may be a spring or a spring plate, and as a preferred embodiment, in this embodiment, the elastic member 31 is a spring plate, which, referring to fig. 6, includes an outer bracket 310 fixed opposite to the housing 1, an inner bracket 311 located at the center of the outer bracket 310, and an elastic arm 312 connected between the outer bracket 310 and the inner bracket 311, and a hollow hole 313 is formed between the elastic arm 312 and the outer bracket 310 and the inner bracket 311 for allowing the air flow to pass through. The outer support 310 is preferably in the shape of a ring surrounding the outer periphery of the inner support 311, and is fixedly connected to the outer shell 1, and preferably, is connected to the upper shell 1a and the lower shell 1b at two sides thereof, for example, by welding or bonding. The inner support 311 is located at the center of the outer support 310, and is connected to the magnet 30, and after the magnet 30 is stressed, the elastic arm 312 is elastically deformed along with the movement of the magnet 30, so as to generate an elastic restoring force. The outer support 310, the inner support 311 and the elastic arm 312 are all in a sheet shape, and the elastic piece 31 is selected to be in an elastic sheet form, so that the overall volume of the acoustic valve can be reduced, and the miniaturization of the acoustic valve is facilitated.

The limiting member 4 is fixed relative to the housing 1, and may be directly connected to the housing 1 by bonding or welding, or may be indirectly connected to the housing 1 by other components, and the limiting member 4 may also be a part of the housing 1, for example, the second end plate 12 of the housing 1 is used as the limiting member 4. The position-limiting members 4 and the valve seat 2 are respectively located at two sides of the magnet 30, and preferably, the position-limiting members 4 are independent parts of the housing 1, are located in the housing 1, are connected to the inner surface of the second end plate 12, and are cylindrical.

The coil 5 is arranged in the shell 1 and is fixed relative to the shell 1. When the coil 5 is energized, a magnetic field is generated, and the magnet 30 is driven to move between the valve seat 2 and the retaining member 4 by applying an attractive force or a repulsive force to the magnet 30 through the magnetic field, so that the magnet 30 can open or close the air flow passage. The elastic member 31 is preferably made of a non-magnetic conductive material such as stainless steel, beryllium copper, plastic, etc. to prevent the magnetic field of the shield magnet 30 and the magnetic field generated by the coil 5, so that the action of switching the position of the magnet 30 is more reliable.

In a preferred embodiment, the valve seat 2 and the position-limiting member 4 are made of a magnetic conductive material that can be magnetically attracted by the magnet 30, so that when the magnet 30 is driven by the magnetic field generated by the coil 5 to contact the valve seat 2, the magnet 30 will be magnetically attracted to the valve seat 2, and at this time, the magnet 30 is in the first position (refer to fig. 4 and 10) for closing the air flow passage, and the coil 5 can keep the magnet 30 in the first position without being continuously energized; similarly, when the magnet 30 is driven by the coil 5 to contact the position-limiting member 4, the magnet 30 will magnetically attract the position-limiting member 4, and at this time, the magnet 30 is in the second position (refer to fig. 5 and 11) that opens the airflow channel, and the coil 5 can keep the magnet 30 in the second position without being continuously energized. Thus, the coil 5 only needs to be electrified when the position of the magnet 30 needs to be switched, and the position is kept without being continuously electrified, so that electricity is saved, and heat generation can be reduced.

The connecting position of the magnet 30 and the elastic member 31 is not limited, the inner support 311 includes a first surface facing the valve seat 2 and a second surface facing the limiting member 4, and in a preferred embodiment, as shown in fig. 3 to 5, the magnet 30 is connected to the first surface of the inner support 311; in another preferred embodiment, as shown in fig. 13, the magnet 30 is attached to the second face of the inner support 311; in still another embodiment, as shown in fig. 15, the magnet 30 is embedded in the inner frame 311, and preferably both sides thereof are exposed to the inner frame, so as to improve the attraction force with the position-limiting member 4 and the valve seat 2.

As a preferred embodiment, the equilibrium position of the elastic member 31 is set between the first position and the second position. When the magnet 30 is located at the first position, a first attraction force is formed between the magnet 30 and the valve seat 2, the elastic member 31 applies a first elastic force to the magnet 30, wherein the direction of the first elastic force is opposite to that of the first attraction force, and the first elastic force is smaller than the first attraction force, so that when the magnet 30 needs to be switched to the second position, the elastic member 31 can provide partial force to help the magnet 30 to return to the second position, the current and voltage required by the coil 5 are smaller, energy is saved, and the position switching action is more reliable; similarly, in the second position, a second attracting force is provided between the magnet 30 and the position-limiting member 4, the elastic member 31 applies a second elastic force to the magnet 30, the second elastic force being opposite to the second attracting force, and the second elastic force is smaller than the second attracting force, so that when the magnet 30 needs to be switched to the first position, the elastic member 31 can also provide a part of the force to help the magnet 30 return to the first position.

In a preferred embodiment, the switching of the magnet between the first and second positions is driven by applying voltages of different directions to the coil 5 to generate magnetic fields of opposite directions, i.e. the control system of the in-ear speaker is able to apply currents of opposite directions to the coil 5 to vary the magnetic field, such that the switching of the position of the magnet 30 is achieved by a single coil 5. Referring to fig. 14, fig. 14 shows the situation when a single coil 5 is provided on the limiting member 4, the coil 5 can be electrified with current in the opposite direction, so as to change the direction of the driving force of the magnetic field generated by the coil 5 on the magnet 30, and the magnet 30 can be switched between the first position and the second position, obviously, the coil 5 can also be provided on the valve seat 2. In another preferred embodiment, the number of the coils 5 is two, the two coils 5 are preferably coaxially arranged, and the two coils 5 are arranged such that one of the two coils 5 is used for generating a magnetic field for switching the driving magnet 30 from the first position to the second position, and the other is used for generating a magnetic field for switching the driving magnet 30 from the second position to the first position, so that the winding direction or the wiring direction of the two coils 5 is changed without a control system for providing reverse voltage or current, i.e. the polarity direction of the magnetic field generated by the two coils can be changed, the two coils 5 can be respectively located at two sides of the magnet 30 or at the same side of the magnet 30, fig. 3 to 5 show a state that the two coils 5 are located at the same side of the magnet 30, the polarity directions of the magnetic fields generated by the two coils 5 are opposite when the two sides are located at the same side, fig. 9 to 11 show a state that the two coils 5 are respectively located at two sides of the magnet 30, on both sides, the polarity directions of the magnetic fields generated by the two coils 5 are the same.

It is to be understood that the number of the coils 5 is not limited to one or two, but may be three or more, for example, a plurality of coils 5 generating magnetic fields in the same polarity direction are provided to increase the magnetic force.

The coil 5 is preferably arranged on the periphery of the valve seat 2 or the limiting part 4, the coil 5 may be directly wound on the valve seat 2 or the limiting part 4, or may be wound into an air coil, and then the air coil is sleeved on the valve seat 2 or the limiting part 4, or may be wound on a coil bobbin, and then the bobbin is sleeved on the valve seat 2 or the limiting part 4. Because the valve seat 2 and the limiting piece 4 are made of magnetic materials, the magnetic force generated by the magnetic materials can be increased by matching with the coil 5, the requirement on the current is further reduced, the energy is saved, and the action switching is more reliable and sensitive.

The coil 5 is routed through the second via 14 to be electrically connected to an external circuit, the coil 5 being powered by the external circuit. Preferably, the number of the second through holes 14 is at least two, and the second through holes are located outside the limiting member 4, so that the lead wires 50 of the coil 5 can pass through (the numbers of the lead wires are shown in fig. 3 and fig. 9), further preferably, the two second through holes 14 are located on two sides of the limiting member 4, and further preferably, the number of the second through holes 14 is four.

As a preferred embodiment, the valve seat 2 and/or the valve core assembly 3 are/is provided with a first buffer 6, when the magnet 30 is in the first position, the valve core assembly 3 and the valve seat 2 are separated by the first buffer 6, so that when the magnet 30 is switched from the second position to the first position, the first buffer 6 can play a role of buffering, impact noise generated during switching can be reduced, and the switch is quiet and comfortable; further preferably, the limiting member 4 and/or the valve core assembly 3 are/is provided with a second buffer 60, and when the magnet 30 is located at the second position, the limiting member 4 and the valve core assembly 3 are separated by the second buffer 60, so that when the magnet 30 is switched from the first position to the second position, the second buffer 60 can play a role of buffering, impact noise generated during switching can be reduced, and the switch is quiet and comfortable. The first cushion 6 and the second cushion 60 are made of soft materials, such as soft rubber, sponge or other soft materials that can absorb shock and reduce noise.

The first cushion pad 6 can reduce the requirement for the fitting precision between the magnet 30 and the valve seat 2, thereby ensuring the sealing reliability and improving the sealing performance.

Example 1

As shown in fig. 1 to 5, in embodiment 1, the valve seat 2 is a first end plate 11 of the housing 1, the acoustic valve includes two coils 5, the two coils 5 are wound on the solid limiting member 4, the magnetic fields generated by the two coils 5 have opposite polarity directions, and the magnet 30 is driven to switch positions by generating the magnetic fields with opposite polarity directions. The magnet 30 of the acoustic valve is attached to a first face of the inner support 311, the first buffer pad 6 is attached to the surface of the magnet 30 facing the first end plate 11, and the second buffer pad 60 is attached to the surface of the stop 4 facing the magnet 30. In addition, the number of the first through holes 13 of the housing 1 is 4, which are opened on the first end plate 11.

Example 2

As shown in fig. 7 to 11, in embodiment 2, the valve seat 2 is a separate component connected to the first end plate 11 of the housing 1, the acoustic valve includes two coils 5, the two coils 5 are respectively wound around the valve seat 2 and the hollow stopper 4, the magnetic fields generated by the two coils 5 have the same polarity direction, and the magnet 30 is driven to switch positions by the magnetic fields having the same polarity direction. The magnet 30 of the acoustic valve is attached to a first face of the inner support 311, the first cushion 6 is attached to the surface of the magnet 30 facing the valve seat 2, and the second cushion 60 is attached to a second face of the inner support 311. In addition, the number of the first through holes 13 is one, and they are opened in the first end plate 11.

Example 3

As shown in fig. 12, embodiment 3 is different from embodiment 1 in that a first cushion 6 is attached to a surface of the first end plate 11 (valve seat 2) facing the magnet 30, and a second cushion 60 is attached to a second surface of the inner support 311.

Example 4

As shown in fig. 13, the embodiment 4 is different from the embodiment 3 in that the magnet 30 is attached to the second surface of the inner frame 311, and the second cushion 60 is attached to the surface of the magnet 30 facing the limiting member 4.

Example 5

As shown in fig. 14, the embodiment 5 is different from the embodiment 1 in that a first through hole 13 is formed in the first end plate 11, the number of the coils 5 wound on the limiting member 4 is one, and a magnetic field with opposite polarity directions is generated by changing the direction of the current flowing through the coil 5, so as to drive the magnet 30 to switch positions.

Example 6

As shown in fig. 15, the embodiment 6 is different from the embodiment 2 in that the magnet 30 is embedded in the inner bracket 311, and both ends protrude outside the first and second faces of the inner bracket 311, respectively, the first cushion 6 is attached to the surface of the valve seat 2 facing the magnet 30, and the second cushion 60 is attached to the surface of the stopper 4 facing the magnet 30.

Example 7

As shown in fig. 16, embodiment 7 differs from embodiment 2 in that both coils 5 of the acoustic valve are wound on the valve seat 2, no coil 5 is provided on the stopper 4, and the stopper 4 is provided solid.

Obviously, when the magnet 30 is switched to the second position, the first through hole 13 and the second through hole 14 are both communicated with the cavity 10, and at this time, the gas flow channel is opened, and gas can flow from one side of the housing 1 to the other side through the gas flow channel; when the magnet 30 is switched to the first position, the first through hole 13 is closed, and at this time, the gas flow passage is closed and the gas passages on both sides of the housing 1 are blocked.

The present invention also proposes an in-ear speaker, as shown in fig. 17, which comprises a housing 8 and an acoustic valve 7 disposed within its housing 8. When the ear-in type loudspeaker is used, the ear canal 9 is provided with the in-ear type loudspeaker, the shell 8 comprises a first end facing the ear canal 9 and a second end facing the outside, the shell 8 is provided with a channel 80 communicating the first end with the second end, the acoustic valve 7 is arranged on the channel 80, and the on-off of the channel 80 can be controlled by controlling the on-off of the acoustic valve 7. The control system of the in-ear speaker can detect whether a person is in a speaking state, when the person is in the speaking state, the control system controls the acoustic valve to be opened, and at the moment, the auditory canal 9 is communicated with the outside of the auditory canal 9 through the channel 80, so that the ear blockage effect can be eliminated; when the people is not in the state of speaking, control system control acoustics valve is closed, and at this moment, the confined space is formed in the duct 9, and isolated external noise that can be better improves the acoustics performance effect of in-ear speaker.

The invention has the following advantages:

The above is only one embodiment of the present invention, and any other modifications based on the concept of the present invention are considered as the protection scope of the present invention.

Claims

1. An acoustic valve, comprising:

a housing (1) provided with an air flow passage communicating the inside and outside thereof;

a valve seat (2) fixed opposite to the housing (1), the air flow passage passing through the valve seat (2);

the valve core assembly (3) comprises a magnet (30) movably arranged in the shell (1) and an elastic piece (31) connected between the shell (1) and the magnet (30);

the limiting pieces (4) are fixed relative to the shell (1) and are respectively positioned on two sides of the magnet (30) together with the valve seat (2); and the number of the first and second groups,

a coil (5), the coil (5) being configured to generate a magnetic field when energized;

the magnet (30) is provided with a first position which is magnetically attracted with the valve seat (2) to close the air flow channel and a second position which is magnetically attracted with the limiting piece (4) to open the air flow channel, and the coil (5) drives the magnet (30) to switch between the first position and the second position through a magnetic field generated by the coil.

2. The acoustic valve according to claim 1, characterized in that the housing (1) is provided with a first through hole (13) and a second through hole (14) respectively located on both sides of the magnet (30), the air flow passage passing through the first through hole (13) and the second through hole (14), and in the first position, the magnet (30) closes the air flow passage by closing the first through hole (13).

3. An acoustic valve according to claim 2, characterised in that the valve seat (2) is part of the housing (1), the first through hole (13) opening onto the valve seat (2).

4. An acoustic valve according to claim 3, characterised in that the retainer (4) is peripherally provided with at least one of the coils (5).

5. The acoustic valve according to claim 2, wherein the valve seat (2) is arranged in the housing (1) and connected to the housing (1), the valve seat (2) being provided with a third through hole (20) communicating with the first through hole (13), the magnet (30) engaging with the valve seat (2) and sealing the third through hole (20) in the first position.

6. Acoustic valve according to claim 5, characterised in that the valve seat (2) and/or the retainer (4) is provided peripherally with at least one coil (5).

7. The acoustic valve according to any one of claims 1 to 6, wherein the elastic member (31) comprises an outer bracket (310) fixed relative to the housing (1), an inner bracket (311) positioned at the center of the outer bracket (310), and a spring arm (312) connected between the outer bracket (310) and the inner bracket (311), a hollow hole (313) is formed between the spring arm (312) and the outer bracket (310) and the inner bracket (311), and the magnet (30) is connected to the inner bracket (311).

8. The acoustic valve according to claim 7, wherein the inner support (311) comprises a first face facing the valve seat (2) and a second face facing the retainer (4); the magnet (30) is attached to the first face; alternatively, the first and second electrodes may be,

the magnet (30) is attached to the second face: alternatively, the first and second electrodes may be,

the magnet (30) is embedded in the inner support (311).

9. The acoustic valve according to any of claims 1 to 6, wherein a first cushion (6) is provided on the valve seat (2) and/or the valve core assembly (3), and in the first position the valve core assembly (3) and the valve seat (2) are separated by the first cushion (6);

and a second cushion pad (60) is arranged on the limiting piece (4) and/or the valve core assembly (3), and when the valve core assembly is at the second position, the limiting piece (4) is separated from the valve core assembly (3) through the second cushion pad (60).

10. The acoustic valve according to any of claims 1 to 6, wherein the magnet (30) is driven to switch between the first position and the second position by applying voltages of different directions to the coil (5) to generate magnetic fields of opposite directions; alternatively, the first and second electrodes may be,

the number of the coils (5) is two, one of the two coils (5) is used for generating a magnetic field for driving the magnet (30) to be switched from the first position to the second position, and the other coil is used for generating a magnetic field for driving the magnet (30) to be switched from the second position to the first position.

11. The acoustic valve according to any one of claims 1 to 6, wherein, in the first position, there is a first attraction force between the magnet (30) and the valve seat (2), the elastic member (31) exerting a first elastic force on the magnet (30) in the opposite direction to the first attraction force, the first elastic force being smaller than the first attraction force;

when in the second position, a second attraction force is arranged between the magnet (30) and the limiting part (4), the elastic part (31) applies a second elastic force opposite to the second attraction force to the magnet (30), and the second elastic force is smaller than the second attraction force.

12. Acoustic valve according to any one of claims 1 to 6, characterised in that the elastic element (31) is made of a non-magnetic material.

13. An in-ear speaker comprising an acoustic valve as claimed in any one of claims 1 to 12.