Acoustic switch and in-ear speaker

Abstract

The present invention discloses an acoustic switch and an in-ear speaker, the acoustic switch comprising: a housing, provided with a gas flow channel connecting the inside and outside of the housing; a magnetic ring, relatively fixed to the housing, through which the gas flow channel passes; a seal, comprising a moving part and an elastic part connected between the moving part and the housing, the moving part at least partially made of a magnetic conductive material; a magnet, relatively fixed to the housing, the magnet and the magnetic ring being respectively located on both sides of the moving part; and a coil, for generating a magnetic field polarizing the moving part by energizing; the moving part has a first position that is magnetically attracted to the magnetic ring to close the gas flow channel and a second position that is magnetically attracted to the magnet to open the gas flow channel, the coil drives the moving part to switch between the first position and the second position by the magnetic field generated by energizing. The acoustic switch of the present invention is conducive to miniaturization, more energy-saving, and generates less heat.

Description

Technical Field

[0001] The invention relates to an acoustic device, in particular to an acoustic switch and an in-ear loudspeaker. Background Art

[0002] In-ear speakers are acoustic devices that are inserted into the human ear canal when in use, such as in-ear headphones and hearing aids. In-ear speakers can isolate the ear canal from the outside world, making the ear canal a relatively closed space, so they have excellent noise isolation and acoustic performance. However, the closed ear canal will produce an ear-blocking effect, causing the wearer's ears to feel stuffy and the sound of their own voice to feel hollow and uncomfortable or too loud, which is not conducive to improving the comfort of using in-ear speakers.

[0003] In the prior art, in order to eliminate the ear-blocking effect, a channel connecting the ear canal and the outside world is often opened on the in-ear speaker, but this method will reduce the noise reduction effect and sound quality performance of the in-ear speaker. In the prior art, there is also a solution of setting an acoustic switch in the in-ear speaker, which can be turned on and off according to the situation. For example, it can be turned off when listening to music, so that the ear canal is relatively closed, and it can be turned on when the wearer speaks, so that the ear canal is connected to the outside world, thereby eliminating the ear-blocking effect.

[0004] However, existing acoustic switches have many disadvantages. For example, they need to be continuously powered when opening and closing the channel, consume a lot of power and are prone to heat. They produce a lot of noise when opening and closing the channel, and have a relatively complex structure, which is not conducive to miniaturization.

[0005] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Summary of the invention

[0006] The object of the present invention is to provide an acoustic switch and an in-ear speaker, wherein the acoustic switch can realize on-off control of a gas flow channel, and has low power consumption and low heat generation.

[0007] To achieve the above-mentioned object of the invention, on the one hand, the present invention provides an acoustic switch, comprising:

[0008] A shell having a gas flow passage connecting the inside and the outside of the shell;

[0009] A magnetic ring, fixed relatively to the housing, through which the gas flow channel passes;

[0010] A sealing member, comprising a moving part and an elastic part connected between the moving part and the housing;

[0011] a magnet fixed relative to the housing, the magnet and the magnetic ring being respectively located at two sides of the moving part, and the polarities of two magnetic poles of the magnetic ring and the magnet being relatively arranged are opposite; and,

[0012] A coil, used for generating a magnetic field to polarize the moving part when energized;

[0013] The moving part has a first position in which it is magnetically attracted to a magnetic ring to close the gas flow channel, and a second position in which it is magnetically attracted to the magnet to open the gas flow channel. The coil polarizes the moving part through a magnetic field generated by energizing the coil to drive the moving part to switch between the first position and the second position.

[0014] Furthermore, the number of the coil is at least one, and magnetic fields with opposite polarities are generated by applying voltages in different directions to the coil to change the polarity of the seal, so as to drive the moving part to switch between the first position and the second position.

[0015] Furthermore, a connecting piece is provided between the housing and the magnet, the coil is provided on the outer periphery of the connecting piece, and a magnetic conductive circuit is formed between the housing, the connecting piece, the magnet and the sealing piece; or,

[0016] A connecting ring is arranged between the shell and the magnetic ring, the gas flow channel passes through the connecting ring, the coil is arranged on the outer periphery of the connecting ring, and a magnetic conductive circuit is formed between the shell, the connecting ring, the magnetic ring and the sealing member.

[0017] Furthermore, the acoustic switch includes two coils that generate magnetic fields with opposite polarities, and the two coils are located on the same side of the moving part.

[0018] Further, a connecting piece is provided between the housing and the magnet, the two coils are provided on the periphery of the connecting piece, and a magnetic conductive circuit is formed between the housing, the connecting piece, the magnet and the sealing piece; or,

[0019] A connecting ring is arranged between the shell and the magnetic ring, the gas flow channel passes through the connecting ring, the two coils are arranged on the outer periphery of the connecting ring, and a magnetic conductive circuit is formed between the shell, the connecting ring, the magnetic ring and the sealing member.

[0020] Furthermore, the acoustic switch includes two coils that generate magnetic fields with opposite polarities, and the two coils are respectively located on both sides of the moving part.

[0021] Furthermore, a connecting piece is provided between the outer shell and the magnet, a connecting ring is provided between the outer shell and the magnetic ring, the gas flow channel passes through the connecting ring, the two coils are respectively provided on the outer periphery of the connecting piece and the connecting ring, a magnetic conductive circuit is formed between the outer shell, the connecting piece, the magnet and the sealing piece, and a magnetic conductive circuit is formed between the outer shell, the connecting ring, the magnetic ring and the sealing piece.

[0022] Furthermore, the shell includes a first end plate and a second end plate that are arranged opposite to each other, the first end plate and the second end plate are respectively provided with a first through hole and a second through hole, and the air flow channel is connected to the outside of the shell through the first through hole and the second through hole.

[0023] Furthermore, the seal also includes a fixed portion surrounding the outer periphery of the moving portion, the fixed portion is connected to the outer shell, the elastic portion is connected between the moving portion and the fixed portion, and a hollow hole is formed between the fixed portion, the elastic portion and the moving portion.

[0024] Further, a first buffer pad is provided on the moving part and / or the magnetic ring, and when the moving part is located at the first position, the moving part and / or the magnetic ring are separated by the first buffer pad;

[0025] A second buffer pad is arranged on the moving part and / or the magnet. When the moving part is located at the second position, the moving part and / or the magnet are separated by the second buffer pad.

[0026] Furthermore, when the moving part is located at the first position, there is a first attraction force between the moving part and the magnetic ring, and the elastic part applies a first elastic force on the moving part in a direction opposite to the first attraction force, and the first elastic force is smaller than the first attraction force;

[0027] When the moving part is located at the second position, there is a second attraction force between the moving part and the magnet, and the elastic part applies a second elastic force opposite to the second attraction force to the moving part, and the second elastic force is smaller than the second attraction force.

[0028] On the other hand, the present invention further provides an in-ear speaker, comprising the acoustic switch as described in any one of the above items.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The principle is simple, fewer parts are needed, the structure can be simplified, and the miniaturization of the acoustic switch can be achieved. At the same time, when the moving part is in the first position and the second position, it is attracted to the magnetic ring or magnet by magnetic force, and the coil does not need to be continuously powered to maintain the state. Therefore, the use of the acoustic switch is more energy-saving and generates less heat. The in-ear speaker using the acoustic switch can conveniently connect the inside and outside of the ear canal or close the ear canal as needed, and can eliminate the ear blocking effect while ensuring the acoustic effect, making it more comfortable to use.

[0031] 2. By arranging the magnet and the magnetic ring so that the two magnetic poles are opposite to each other, the directions of the forces exerted by the magnetic ring and the magnet on the polarized moving part can be the same, so that the moving part can move more sensitively and reliably when switching positions, and the requirements for the magnetic field generated by the coil are small, which is more conducive to saving electricity and reducing heat.

[0032] 3. By providing the first buffer pad and the second buffer pad, the moving part can be buffered by the buffer pad when switching positions, which can achieve buffering and noise reduction effects, and prevent loud noise from being generated due to collision, affecting the comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of an acoustic switch according to an embodiment of the present invention.

[0034] Figure 2 yes Figure 1 An exploded view of the acoustic switch is shown.

[0035] Figure 3 yes Figure 1 A perspective cutaway view of the acoustic switch shown.

[0036] Figure 4 yes Figure 1 A cross-sectional view of an acoustic switch is shown, in which the moving part is in a first position.

[0037] Figure 5 yes Figure 1 A cross-sectional view of the acoustic switch is shown, in which the moving part is in the second position.

[0038] Figure 6 It is a schematic diagram of the structure of the sealing member in the present invention.

[0039] Figure 7 It is a schematic structural diagram of an acoustic switch according to an embodiment of the present invention.

[0040] Figure 8 yes Figure 7 An exploded view of the acoustic switch is shown.

[0041] Fig. 9 yes Figure 7 A perspective cutaway view of the acoustic switch shown.

[0042] Fig.10 yes Figure 7 A cross-sectional view of an acoustic switch is shown, in which the moving part is in a first position.

[0043] Fig.11 yes Figure 7 A cross-sectional view of the acoustic switch is shown, in which the moving part is in the second position.

[0044] Fig.12 It is a schematic diagram of the path of magnetic flux lines generated after the coil located below the seal in the present invention is energized.

[0045] Fig.13 It is a schematic diagram of the path of magnetic flux lines generated after the coil located above the sealing member in the present invention is energized.

[0046] Fig.14 It is a schematic diagram of the present invention in which the moving part is located between the magnetic ring and the magnet, and the moving part is polarized to the N pole.

[0047] Fig.15 It is a schematic diagram of the present invention in which the moving part is located between the magnetic ring and the magnet, and the moving part is polarized to the S pole.

[0048] Fig.16 It is a schematic structural diagram of an acoustic switch in one embodiment of the present invention, in which two coils are arranged on the magnetic ring.

[0049] Fig.17 3 is a schematic structural diagram of an acoustic switch according to an embodiment of the present invention. In the figure, a first buffer pad and a second buffer pad are respectively arranged on a magnetic ring and a magnet.

[0050] Fig.18 It is a schematic structural diagram of an acoustic switch according to an embodiment of the present invention. In the figure, a single coil is provided on the connecting member, and no connecting ring is provided.

[0051] Fig.19 It is a schematic diagram of the in-ear speaker of the present invention plugged into the ear canal. DETAILED DESCRIPTION

[0052] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0053] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] like Figures 1 to 17 As shown, an acoustic switch corresponding to a preferred embodiment of the present invention includes a housing 1, a magnetic ring 2, a seal 3, a magnet 4 and a coil 5.

[0056] The housing 1 is provided with a gas flow passage connecting the inside and the outside thereof, and the gas flow passage is connected from one side of the housing 1 to the other side of the housing 1. Preferably, the gas flow passage connects the two opposite sides of the housing 1. Figure 4 Taking the shell 1 shown as an example, it has an upper side, a lower side, a left side and a right side. The gas flow channel preferably connects the upper side and the lower side thereof. Of course, it can also connect the upper side and the left side or the upper side and the right side of the shell 1. Of course, other connection situations are also possible.

[0057] The shell 1 is provided with a cavity 10 and a first through hole 11 and a second through hole 12 connecting the cavity 10 and the outside of the shell 1. The gas flow path is connected with the outside of the shell 1 through the first through hole 11 and the second through hole 12. The side where the first through hole 11 and the second through hole 12 are located is the connecting side of the gas flow path. Preferably, the first through hole 11 and the second through hole 12 are arranged on opposite sides of the shell 1. Further preferably, the first through hole 11 and the second through hole 12 are respectively located on both sides of the seal 3.

[0058] The housing 1 preferably includes a plurality of housings, and the plurality of housings are connected to form the housing 1. In this embodiment, Figure 2 and Figure 8 The housing 1 includes an upper housing 1a and a lower housing 1b connected to each other. In addition, the shape of the housing 1 is not limited. Preferably, the housing 1 is cylindrical, and has a first end plate 13 and a second end plate 14 at both ends. The first end plate 13 and the second end plate 14 in the form of a flat plate can facilitate the installation of other components. Of course, the housing 1 is not limited to being cylindrical. For example, it can also be set to a rectangular parallelepiped, a triangular prism, a sphere, etc. As a preferred embodiment, the first through hole 11 and the second through hole 12 are respectively opened on the first end plate 13 and the second end plate 14.

[0059] The magnetic ring 2 is relatively fixed to the housing 1. In a preferred embodiment, Figures 3 to 5, the magnetic ring 2 is directly connected to the inner wall of the shell 1 (specifically, the first end plate 13 of the shell 1) by gluing or welding, and the gas flow path passes through the magnetic ring 2. Specifically, the magnetic ring 2 is provided with a third through hole 20 communicating with the first through hole 11, and the gas flow path communicates the inside and outside of the shell 1 through the first through hole 11 and the third through hole 20. The outer periphery of the magnetic ring 2 surrounds the outside of the first through hole 11 to prevent a gap from appearing between the first through hole 11 and the outer periphery of the magnetic ring 2. In another preferred embodiment, the magnetic ring 2 is indirectly connected to the inner wall of the shell 1 through other parts, refer to Figures 8 to 11 A connecting ring 6 is provided between the magnetic ring 2 and the inner wall of the first end plate 13. The connecting ring 6 is provided with a fourth through hole 61 connecting the first through hole 11 and the third through hole 20 for the gas flow passage to pass through. The gas flow passage can be closed by closing the third through hole 20 of the magnetic ring 2.

[0060] like Figure 6 As shown, the seal 3 includes a moving part 30 and an elastic part 31 connected between the moving part 30 and the housing 1. The moving part 30 is made of a magnetic conductive material. When it contacts the magnetic ring 2, it can be attracted by the magnetic ring 2, thereby closing the third through hole 20 and closing the gas flow channel. The elastic part 31 enables the moving part 30 to move toward or away from the magnetic ring 2, and can exert a certain elastic force, so that the moving part 30 has a tendency to return to the equilibrium position of the seal 3. The equilibrium position here refers to the position when the seal 3 does not undergo elastic deformation. Figure 3 and Fig. 9 The seal 31 is shown in a state in a balanced position.

[0061] In order to facilitate the connection between the seal 3 and the housing 1, the seal 3 also includes a fixed portion 32 that is wrapped around the outer periphery of the moving portion 30, and the elastic portion 31 is connected between the fixed portion 32 and the moving portion 30, and is connected to the housing 1 through the fixed portion 32. A hollow hole 33 is formed between the fixed portion 32, the moving portion 30 and the elastic portion 31 to facilitate the passage of airflow. Preferably, the fixed portion 32 is connected between the upper shell 1a and the lower shell 1b, and its two sides are respectively bonded or welded to the upper shell 1a and the lower shell 1b. Preferably, the seal 3 is in a sheet shape as a whole, and the seal is made of magnetic conductive material.

[0062] The magnet 4 is relatively fixed to the housing 1. Similar to the magnetic ring 2, it can be directly connected to the inner wall of the housing 1 by gluing or welding, or indirectly connected to the housing 1 by other parts. Figures 3 to 5 As shown, the magnet 4 is indirectly connected to the inner wall of the second end plate 14 through the connecting member 60, and the connecting member 60 is connected between the second end plate 14 and the magnet 4. In another feasible embodiment, referring to Figures 9 to 11, the magnet 4 is directly connected to the inner wall of the second end plate 14. The polarities of the two magnetic poles of the magnetic ring 2 and the magnet 4 that are arranged opposite to each other are opposite.

[0063] The magnetic ring 2 and the magnet 4 are respectively located on both sides of the seal 3. The moving part 30 of the seal 3 can move between the magnetic ring 2 and the magnet 4. It has a first position where it is magnetically attracted to the magnetic ring 2 to close the gas flow channel and a second position where it is magnetically attracted to the magnet 4 to open the gas flow channel. The coil 5 is arranged inside the housing 1 and is used to generate a magnetic field when powered. The magnetic field can polarize the moving part 30 so that the moving part 30 is polarized to the S pole or the N pole. In this way, since the polarities of the two magnetic poles of the magnetic ring 2 and the magnet 4 are opposite, when one of the magnetic ring 2 and the magnet 4 applies an attractive force to the moving part 30, the other will apply a repulsive force to it. After changing the polarity of the moving part 30, the attractive force and the repulsive force will also change in the opposite direction, so that the moving part 30 can be attracted to the magnetic ring 2 or attracted to the magnet 4, and then switch between the first position and the second position to realize the opening and closing of the gas flow channel.

[0064] It is understood that, although the magnet 4 shown in the figure is annular, the magnet 4 can also be set to be solid. The magnet 4 is preferably set to be the same as the magnetic ring 2 so that the two have substantially the same magnetic force.

[0065] The coil 5 is electrically connected to the control system of the acoustic switch, and is connected to the outside through a lead 50 to be connected to a circuit board of the control system, etc., and can be powered by the control system and controlled by it, thereby generating a magnetic field as needed. The lead 50 is passed through the second through hole 12 to the outside of the housing 1. Preferably, the number of the second through holes 12 is at least two, and they are located outside the magnet 4 to facilitate the lead 50 of the coil 5 to pass through. More preferably, the two second through holes 12 are respectively located on both sides of the magnet 4. More preferably, the number of the second through holes 12 is four.

[0066] It can be understood that since the moving part 30 can be magnetically attracted by the magnetic ring 2 in the first position and can be magnetically attracted by the magnet 4 in the second position, the coil 5 does not need to be continuously energized to keep the moving part 30 in the current position. The coil 5 only needs to pass current when the position of the moving part 30 is switched, which is more energy-efficient and reduces heat generation.

[0067] The principle of generating a magnetic field by energizing the coil 5 to polarize the seal 3 is that after the coil 5 is energized, the magnetic field generated by it will generate a loop between the coil 5, the housing 1 and the seal 3, so that the seal 3 becomes an N pole or an S pole. For details, refer to Fig.12, a connector 60 made of a magnetic conductive material is provided in the figure to improve the magnetic conductive effect. The coil 5 is provided on the connector 60. It can be directly wound on the connector 60, or it can be first wound into a hollow coil and then the hollow coil is sleeved on the connector 60. It can also be first wound on a coil skeleton and then the skeleton is sleeved on the connector 60. When the coil 5 is energized, the connector 60, the housing 1 (specifically the lower housing 1b), the magnet 4 and the seal 3 will form a magnetic conductive circuit. It can be understood that in order to form a magnetic conductive circuit, the connector 60, the seal 3 and the lower housing 1b of the housing 1 are all made of magnetic conductive materials to guide the magnetic flux lines to pass through. The magnetic flux lines will be in the form of Fig.12 The direction of the arrow shown forms a closed loop. The magnetic flux lines shown in the figure are emitted from the upper end of the connector 60, pass through the magnet 4, the seal 3, and the side wall of the housing 1, and then return to the connector 60 through the second end plate 14. The magnet 4 serves as a magnetic conductive medium in the loop, that is, the upper end of the connector 60 is polarized to the N pole, and the moving part 30 is polarized to the S pole. Obviously, when the coil 5 is passed through a reverse current, the upper end of the connector 60 will be polarized to the S pole, and the moving part 30 will be polarized to the N pole.

[0068] Similarly, when a connecting ring 6 made of a magnetic conductive material is provided to improve the magnetic conductive effect, the coil 5 can be provided on the connecting ring 6, and can be directly wound on the connecting ring 6, or can be first wound into a hollow coil and then the hollow coil is sleeved on the connecting ring 6, or can be first wound on a coil skeleton and then the skeleton is sleeved on the connecting ring 6. The connecting member 60, the sealing member 3 and the upper shell 1a are all made of magnetic conductive materials, so that a magnetic conductive circuit is formed between the shell 1, the connecting ring 6, the magnetic ring 2 and the sealing member 3. When the coil 5 is energized, the path of the magnetic flux line is roughly along Fig.13 The arrow direction shown forms a closed loop, the magnetic ring 2 acts as a magnetic medium in the loop, and the lower end of the connecting ring 6 and the moving part 30 are polarized to the N pole and the S pole respectively. When the coil 5 is supplied with a reverse current, the path of the magnetic flux lines will also be opposite, and the moving part will be polarized to the N pole.

[0069] refer to Fig.14 , Fig.14 In the figure, the polarities of the two magnetic poles of the magnetic ring 2 and the magnet 4 are respectively N pole and S pole. When the moving part 30 is polarized to the N pole, the magnetic ring 2 exerts a repulsive force on the moving part 30, and the magnet 4 exerts an attractive force on the moving part 30. The moving part 30 will move downward and attract the magnet 4. At this time, the moving part 30 is in the second position, and the gas flow channel is opened. Further, when it is necessary to switch to the first position, it is only necessary to change the direction of the magnetic field of the polarized moving part 30. Fig.15, so that the moving part 30 is polarized to the S pole. At this time, the magnet 4 applies a repulsive force to the moving part 30, and the magnetic ring 2 applies an attractive force to the moving part 30. The directions of the two forces are consistent. The moving part 30 will reliably switch to the first position and be attracted to the magnetic ring 2. It has high sensitivity, small requirements on the current passed through the coil 5, and is more energy-saving and reliable.

[0070] In a first preferred embodiment, the coil 5 changes the polarity of the moving part 30 by generating a magnetic field in the opposite direction, thereby switching the moving part 30 between the first position and the second position, for example, by changing the direction of the voltage at both ends of the coil 5 (for example, positive and negative pulses) to change the direction of the magnetic field. In this embodiment, the number of coils 5 can be only one, and the direction of the magnetic field generated by it can be changed by controlling the direction of the current passing through it. The coil 5 can be arranged on the upper side or the lower side of the moving part 30. For example, the coil 5 can be arranged only on the connecting member 60 without the connecting ring 6, or the connecting ring 6 can be arranged but the coil 5 is not arranged on the connecting ring 6, refer to Fig.18 , Fig.18 The case where a single coil 5 is provided on the connecting member 60 and the connecting ring 6 is not provided is shown; for another example, in another feasible implementation, the coil 5 may be provided only on the connecting ring 6 without providing the connecting member 60, or the connecting member 60 may be provided but the coil 5 is not provided on the connecting member 60. Obviously, the number of coils 5 is not limited to one, and one or more coils 5 may be wound around the connecting ring 6 and the connecting member 60.

[0071] In a second preferred embodiment, the acoustic switch includes two coils 5, and the polarity directions of the magnetic fields generated by the two coils 5 are opposite. Thus, the polarity direction of the magnetic field generated by the two coils 5 can be changed by changing the winding direction of the coils 5 or reversing the connection terminals thereof, which is very convenient. In a feasible embodiment, the two coils 5 are located on the same side of the moving part 30, for example, referring to Figure 4 , both coils 5 are wound around the connecting member 60 described above, or, referring to Fig.16 , the two coils 5 are wound around the connecting ring 6 described above. In another feasible embodiment, the two coils 5 are respectively located on both sides of the moving part 30, for example, referring to Fig.10 A coil 5 is wound around the connecting piece 60 and the connecting ring 6 mentioned above.

[0072] Obviously, the number of coils 5 is not limited to one or two. For example, a plurality of coils 5 that generate magnetic fields of the same polarity may be provided to increase the magnetic induction intensity.

[0073] As a preferred embodiment, a first buffer pad 7 is provided on the moving part 30 and / or the magnetic ring 2. When the moving part 30 is in the first position, the moving part 30 and the magnetic ring 2 are separated by the first buffer pad 7. In this way, when the moving part 30 switches from the second position to the first position, the first buffer pad 7 can play a buffering role, which can reduce the impact noise generated during the switching, making it quieter and more comfortable; further preferably, a second buffer pad 70 is provided on the magnet 4 and / or the moving part 30. When the moving part 30 is in the second position, the magnet 4 and the moving part 30 are separated by the second buffer pad 70. In this way, when the moving part 30 switches from the first position to the second position, the second buffer pad 70 can play a buffering role, which can reduce the impact noise generated during the switching, making it quieter and more comfortable. The above-mentioned first buffer pad 7 and second buffer pad 70 are both made of soft materials, such as soft rubber, sponge or other soft materials that can absorb vibration and reduce noise.

[0074] The provision of the first buffer pad 7 can also reduce the requirement on the fitting accuracy between the moving part 30 and the magnetic ring 2, thereby ensuring the reliability of the seal and improving the sealing performance.

[0075] It is understandable that the first buffer pad 7 can be like Figure 4 As shown, it is arranged on the surface of the moving part 30 facing the magnetic ring 2, or as Fig.17 As shown in FIG. 1 , the first buffer pad 7 is arranged on the surface of the magnetic ring 2 facing the moving part 30, or the first buffer pad 7 is arranged on the surface of the moving part 30 facing the magnetic ring 2 and the surface of the magnetic ring 2 facing the moving part 30. Similarly, the second buffer pad 70 can be arranged as Figure 4 As shown, it is arranged on the surface of the moving part 30 facing the magnet 4, or as Fig.17 As shown in the figure, the second buffer pad 70 is arranged on the surface of the magnet 4 facing the moving part 30, or the second buffer pad 70 is arranged on the surface of the moving part 30 facing the magnet 4 and the surface of the magnet 4 facing the moving part 30.

[0076] As a preferred embodiment, the equilibrium position of the seal 3 is set to be between the first position and the second position. When the moving part 30 is in the first position, there is a first attraction force between the moving part 30 and the magnetic ring 2, and the seal 3 applies a first elastic force opposite to the first attraction force to the moving part 30, and the first elastic force is smaller than the first attraction force. In this way, when the moving part 30 needs to switch to the second position, the seal 3 can provide part of the force to help the moving part 30 return to the second position, and the coil 5 requires less current and voltage, which is more energy-efficient and makes the position switching action more reliable; similarly, in the second position, there is a second attraction force between the moving part 30 and the magnet 4, and the seal 3 applies a second elastic force opposite to the second attraction force to the magnet 4, and the second elastic force is smaller than the second attraction force. When the moving part 30 needs to switch to the first position, the seal 3 can also provide part of the force to help the moving part 30 return to the first position.

[0077] The present invention also provides an in-ear speaker, such as Fig.19 As shown, it includes a shell 8 and an acoustic switch 81 disposed in the shell 8. When in use, the in-ear speaker is inserted into the ear canal 9, the shell 8 includes a first end facing the ear canal 9 and a second end facing the outside, the shell 8 is provided with a channel 80 connecting the first end and the second end, the acoustic switch 81 is provided on the channel 80, and the on-off of the channel 80 can be controlled by controlling the on-off of the acoustic switch 81. The control system of the in-ear speaker can detect whether a person is in a speaking state. When a person is in a speaking state, the control system controls the acoustic switch to turn on. At this time, the ear canal 9 and the outside of the ear canal 9 are connected through the channel 80, which can eliminate the ear blocking effect; when a person is not in a speaking state, the control system controls the acoustic switch to turn off. At this time, a closed space is formed in the ear canal 9, which can better isolate external noise and improve the acoustic performance of the in-ear speaker.

[0078] The present invention has at least the following advantages:

[0079] 1. The principle is simple, fewer parts are needed, the structure can be simplified, and the miniaturization of the acoustic switch can be achieved. At the same time, when the moving part is in the first position and the second position, it is attracted to the magnetic ring or magnet by magnetic force, and the coil does not need to be continuously powered to maintain the state. Therefore, the use of the acoustic switch is more energy-saving and generates less heat. The in-ear speaker using the acoustic switch can conveniently connect the inside and outside of the ear canal or close the ear canal as needed, and can eliminate the ear blocking effect while ensuring the acoustic effect, making it more comfortable to use.

[0080] 2. By arranging the magnet and the magnetic ring so that the two magnetic poles are opposite to each other, the directions of the forces exerted by the magnetic ring and the magnet on the polarized moving part can be the same, so that the moving part can move more sensitively and reliably when switching positions, and the requirements for the magnetic field generated by the coil are small, which is more conducive to saving electricity and reducing heat.

[0081] 3. By providing the first buffer pad and the second buffer pad, the moving part can be buffered by the buffer pad when switching positions, which can achieve buffering and noise reduction effects, and prevent loud noise from being generated due to collision, affecting the comfort of use.

[0082] The above is only a specific implementation of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. An acoustic switch, characterized in that: include: A housing (1) provided with a gas flow passage connecting the interior and exterior of the housing (1), the housing (1) being provided with a cavity (10) and a first through hole (11) and a second through hole (12) connecting the cavity (10) and the exterior of the housing (1), the gas flow passage being connected to the exterior of the housing (1) via the first through hole (11) and the second through hole (12); A magnetic ring (2) is fixed relative to the housing (1), and the gas flow channel passes through the magnetic ring (2); A sealing member (3) comprising a moving portion (30) and an elastic portion (31) connected between the moving portion (30) and the housing (1); a magnet (4) fixed relative to the housing (1), the magnet (4) and the magnetic ring (2) being located on both sides of the moving part (30) respectively, and the polarities of two magnetic poles of the magnetic ring (2) and the magnet (4) being opposite to each other; and A coil (5) for generating a magnetic field that polarizes the moving part (30) when energized; The moving part (30) has a first position in which it is magnetically attracted to the magnetic ring (2) to close the gas flow channel, and a second position in which it is magnetically attracted to the magnet (4) to open the gas flow channel, and the coil (5) polarizes the moving part (30) through the magnetic field generated by energizing the coil (5) to drive the moving part (30) to switch between the first position and the second position; The sealing member (3) further comprises a fixed portion (32) surrounding the outer periphery of the moving portion (30), the fixed portion (32) being connected to the housing (1), the elastic portion (31) being connected between the moving portion (30) and the fixed portion (32), and a hollow hole (33) being formed between the fixed portion (32), the elastic portion (31) and the moving portion (30).

2. The acoustic switch according to claim 1, characterized in that The number of the coil (5) is at least one, and voltages in different directions are applied to the coil (5) to generate magnetic fields with opposite polarity directions to change the polarity of the sealing member (3), thereby driving the moving part (30) to switch between the first position and the second position.

3. The acoustic switch according to claim 2, characterized in that A connecting piece (60) is provided between the housing (1) and the magnet (4), the coil (5) is provided on the periphery of the connecting piece (60), and a magnetic conductive circuit is formed between the housing (1), the connecting piece (60), the magnet (4) and the sealing piece (3); or, A connecting ring (6) is provided between the housing (1) and the magnetic ring (2), the gas flow channel passes through the connecting ring (6), the coil (5) is provided on the outer periphery of the connecting ring (6), and a magnetic conductive circuit is formed between the housing (1), the connecting ring (6), the magnetic ring (2) and the sealing member (3).

4. The acoustic switch according to claim 1, characterized in that: It comprises two coils (5) that generate magnetic fields with opposite polarities, and the two coils (5) are located on the same side of the moving part (30).

5. The acoustic switch according to claim 4, characterized in that A connecting piece (60) is provided between the housing (1) and the magnet (4), the two coils (5) are both provided on the periphery of the connecting piece (60), and a magnetic conductive circuit is formed between the housing (1), the connecting piece (60), the magnet (4) and the sealing piece (3); or, A connecting ring (6) is provided between the housing (1) and the magnetic ring (2), the gas flow channel passes through the connecting ring (6), the two coils (5) are both provided on the outer periphery of the connecting ring (6), and a magnetic conductive circuit is formed between the housing (1), the connecting ring (6), the magnetic ring (2) and the sealing member (3).

6. The acoustic switch according to claim 1, wherein: It comprises two coils (5) that generate magnetic fields with opposite polarity directions, and the two coils (5) are respectively located on both sides of the moving part (30).

7. The acoustic switch according to claim 6, characterized in that A connecting piece (60) is provided between the housing (1) and the magnet (4), a connecting ring (6) is provided between the housing (1) and the magnetic ring (2), the gas flow passage passes through the connecting ring (6), the two coils (5) are respectively provided on the outer circumferences of the connecting piece (60) and the connecting ring (6), a magnetic conductive circuit is formed between the housing (1), the connecting piece (60), the magnet (4) and the sealing member (3), and a magnetic conductive circuit is formed between the housing (1), the connecting ring (6), the magnetic ring (2) and the sealing member (3).

8. The acoustic switch according to any one of claims 1 to 7, characterized in that: The housing (1) comprises a first end plate (13) and a second end plate (14) which are arranged opposite to each other, and the first end plate (13) and the second end plate (14) are respectively provided with a first through hole (11) and a second through hole (12).

9. The acoustic switch according to any one of claims 1 to 7, characterized in that: A first buffer pad (7) is provided on the moving part (30) and / or the magnetic ring (2); when the moving part (30) is located at the first position, the moving part (30) and / or the magnetic ring (2) are separated by the first buffer pad (7); A second buffer pad (70) is provided on the moving part (30) and / or the magnet (4); when the moving part (30) is located at the second position, the moving part (30) and / or the magnet (4) are separated by the second buffer pad (70).

10. The acoustic switch according to any one of claims 1 to 7, characterized in that: When the moving part (30) is located at the first position, a first attraction force exists between the moving part (30) and the magnetic ring (2), and the elastic part (31) applies a first elastic force on the moving part (30) in a direction opposite to the first attraction force, wherein the first elastic force is smaller than the first attraction force; When the moving part (30) is located at the second position, a second attraction force exists between the moving part (30) and the magnet (4), and the elastic part (31) applies a second elastic force on the moving part (30) in a direction opposite to the second attraction force, wherein the second elastic force is smaller than the second attraction force.

11. An in-ear speaker, characterized in that: Comprising the acoustic switch according to any one of claims 1 to 10.

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