Air switch and earphone

Abstract

The utility model provides an air switch and earphone, including the casing, be equipped with the gas channel of both ends opening, voice coil subassembly, magnetic subassembly and elastic subassembly in the casing, the voice coil subassembly can generate magnetic field when electrified, the magnetic field and magnetic subassembly attract or repel each other, the elastic subassembly is equipped with the elastic subassembly. The elastic assembly is connected with the voice coil assembly and / or the magnetic assembly, and the position of the voice coil assembly and / or the magnetic assembly is changed to change the ventilation capacity of the gas channel. When the voice coil assembly is electrified, the voice coil assembly drives the voice coil assembly or the magnetic assembly connected with the voice coil assembly to move and closes or releases the gas channels, and the plurality of gas channels can be partially or completely closed or released, so that the gas channels can be completely closed, partially closed and completely released. Therefore, the earphone has three working modes: a closed mode, a motion mode and a transparent mode, the whole machine is simpler to assemble, and the performance is more convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the field of electronic products, in particular to an air switch and an earphone. Background Art

[0002] The advantages of open-back headphones are: 1. More natural sound: open-back headphones usually have higher sound fidelity, better spatial sense, and more natural sound; 2. More comfortable: open-back headphones generate less pressure inside the ear and are more comfortable to wear; 3. Lower ear pressure: Since the open design allows air to circulate, it is unobstructed and there will be no "ear pressure" problem of closed headphones; 4. Suitable for sports: The in-ear design of open-back headphones can also feel the external ambient sound during outdoor sports, which greatly improves safety and avoids unnecessary accidents. At the same time, open-back headphones are more stable and comfortable to wear, and will not fall off during sports. Disadvantages are: 1. Poor noise isolation: open-back headphones cannot isolate external noise well, so they may not be suitable for use in noisy environments, and are more suitable for wearing in sports scenes; 2. Sound leakage: The sound of open-back headphones will leak out, and may not be suitable for use in public places to avoid disturbing others; 3. The front cavity of the earphone has a leak hole, and foreign objects will enter the earphone, resulting in poor acoustic performance; 4. The front cavity of the earphone has a pressure relief hole, and liquids such as sweat will enter, and the front noise reduction microphone is easily damaged.

[0003] The advantages of closed headphones are: 1. Better noise isolation: closed headphones are usually better at isolating external noise and are suitable for use in noisy environments; 2. Better sound leakage: closed headphones have less sound leakage and are suitable for use in public places. Disadvantages are: 1. The sound may not be as natural: closed headphones do not sound as natural as open headphones; 2. Poor comfort: closed headphones create pressure inside the ear and are not as comfortable to wear as open headphones.

[0004] The existing technology is either open-type headphones or closed-type headphones, which cannot meet the usage needs of consumers. In view of the above situation, there is an urgent need for a functional mode that can switch between open and closed-type headphones at will, which can have the advantages of both open and closed headphones. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide an air switch and a headset.

[0006] The purpose of the utility model is achieved through the following technical measures: an air switch, characterized in that it includes a shell, a gas channel with openings at both ends, a voice coil assembly, a magnetic assembly and an elastic assembly are arranged in the shell, the voice coil assembly can generate a magnetic field when energized, the magnetic field and the magnetic assembly are attracted or repelled, the elastic assembly is connected to the voice coil assembly and / or the magnetic assembly, and the position of the voice coil assembly and / or the magnetic assembly changes to change the ventilation volume of the gas channel.

[0007] As a preferred solution, the gas channel may be in a closed state, a partially open state, or a fully open state;

[0008] The first gas port and / or the second gas port are closed, and the gas channel is in a closed state;

[0009] The first gas port is partially open, the second gas port is open, or the first gas port is open, the second gas port is partially open, or the first gas port is partially open, the second gas port is partially open, and the gas channel may be in a partially open state;

[0010] The first gas port is open, the second gas port is open, and the gas channel is in a completely open state.

[0011] As a preferred solution, the gas channel is located between the magnetic assembly and the voice coil assembly, or between the housing and the voice coil assembly or the magnetic assembly.

[0012] As a preferred solution, one end of the gas channel is a first gas port, and the other end is a second gas port. There is at least one first gas port and at least one second gas port, and the first gas port and the second gas port are respectively arranged on opposite or adjacent surfaces of the shell.

[0013] As a preferred solution, the elastic component is installed on the shell and is located near the first gas port or the second gas port. The elastic component moves towards or away from the first gas port or the second gas port along the gas flow direction of the gas channel. A buffer is provided on the side of the elastic component close to the first gas port or the second gas port.

[0014] As a preferred solution, the elastic component is mounted on the housing and is located near the first gas port or the second gas port, and the elastic component slides along the first gas port or the second gas port perpendicular to the gas flow direction of the gas channel.

[0015] As a preferred solution, the elastic components are provided in two groups, and the two groups of the elastic components can be close to or far away from each other. A seal is provided on the side where the two groups of the elastic components are close to each other, and the seal moves to control the switching status of the first gas port and / or the second gas port to control the ventilation volume of the gas channel.

[0016] As a preferred solution, the magnetic component is arranged corresponding to the voice coil component, a magnetic attraction part is arranged on the outer shell, the first air port or the second air port is arranged on the magnetic attraction part, a plurality of the first air port or the second air port are arranged, and the magnetic attraction part, the elastic component and the magnetic component or the voice coil component are all arranged one by one corresponding to the first air port or the second air port.

[0017] As a preferred solution, the magnetic components and voice coil components are arranged alternately, and there are multiple magnetic components and / or voice coil components. The magnetic poles of adjacent magnetic components or the magnetic poles generated by adjacent voice coil components when powered on are in opposite directions.

[0018] As a preferred solution, a plurality of magnetic assemblies and / or voice coil assemblies are provided, the magnetic poles of adjacent magnetic assemblies are in opposite directions, and the magnetic poles generated by adjacent voice coil assemblies when energized are in opposite directions.

[0019] A headset, characterized in that it comprises an upper shell, a middle shell and a lower shell and the air switch as claimed in the above claims, a speaker is installed in the cavity surrounded by the lower shell and the upper shell, a front cavity is formed between the speaker and the upper shell, the upper shell is provided with a leakage hole connected to the front cavity, the air switch is installed at the leakage hole, wherein the first air port of the air switch is connected to the front cavity, and the second air port is connected to the leakage hole, and the switching of the headset state is inductive, sliding, pressing or voice-based.

[0020] Due to the adoption of the above technical scheme, compared with the prior art, the advantages of the utility model are: through the interacting voice coil assembly and magnetic assembly, when the voice coil assembly is energized, it can generate attraction or repulsion with the magnetic assembly, thereby controlling the full ventilation, semi-ventilation and sealing of the first air port or the second air port under the drive of the elastic member; the earphone has three working modes: closed mode, sports mode, and transparent mode, and makes the assembly of the whole machine simpler and the performance adjustment more convenient.

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 The utility model is a schematic diagram of the combined structure of an air switch.

[0023] Attached Figure 2 The utility model is a schematic diagram of the explosion structure of an air switch.

[0024] Attached Figure 3 The utility model is a schematic diagram of the internal structure of an air switch.

[0025] Attached Figure 4 The utility model is a schematic diagram of the structure of a vibration plate of an air switch.

[0026] Attached Figure 5 The utility model is a schematic diagram of the closed state structure of an air switch.

[0027] Attached Figure 6 The utility model is a schematic diagram of the comfortable state structure of an air switch.

[0028] Attached Figure 7 The utility model is a schematic diagram of the structure of an air switch in a transparent state.

[0029] Attached Figure 8 The utility model is a schematic diagram of the structure of a vibration plate of an air switch.

[0030] Attached Fig. 9 The utility model is a schematic diagram of the structure of a vibration plate of an air switch.

[0031] Attached Fig.10 The utility model is a schematic diagram of the structure of a vibration plate of an air switch.

[0032] Attached Fig.11 The utility model is a schematic diagram of the structure of a vibration plate of an air switch.

[0033] Attached Fig.12 It is a voltage schematic diagram of an air switch of the utility model.

[0034] Attached Fig.13 It is a schematic diagram of the conditions to be satisfied for switching various modes of an air switch of the utility model.

[0035] Attached Fig.14 It is a schematic diagram of the explosion structure of Example 4 of an air switch of the utility model.

[0036] Attached Fig.15 It is a schematic diagram of the closed state structure of Example 4 of an air switch of the utility model.

[0037] Attached Fig.16 It is a schematic diagram of the structure of the open state of Example 4 of an air switch of the utility model.

[0038] Attached Fig.17 It is a schematic diagram of the semi-open state structure of Example 4 of an air switch of the utility model.

[0039] Attached Fig.18 It is a schematic diagram of the explosion structure of Example 5 of an air switch of the utility model.

[0040] Attached Fig.19 It is a schematic diagram of the structure of a half-open state of Example 5 of an air switch of the utility model.

[0041] Attached Fig. 20It is a schematic diagram of the closed state structure of Example 5 of an air switch of the utility model.

[0042] Attached Fig.21 It is a schematic diagram of the open state structure of Example 5 of an air switch of the utility model.

[0043] Attached Fig. 22 It is a schematic diagram of the explosion structure of Example 6 of an air switch of the utility model.

[0044] Attached Fig.23 It is a schematic diagram of the semi-open state structure of Example 6 of an air switch of the utility model.

[0045] Attached Fig.24 It is a schematic diagram of the closed state structure of Example 6 of an air switch of the utility model.

[0046] Attached Fig.25 It is a schematic diagram of the structure of the open state of Example 6 of an air switch of the utility model.

[0047] Attached Fig.26 It is a schematic diagram of the explosion structure of Example 7 of an air switch of the utility model.

[0048] Attached Fig. 27 It is a schematic diagram of the structure of a semi-open state of Example 7 of an air switch of the utility model.

[0049] Attached Fig.28 It is a schematic diagram of the closed state structure of Example 7 of an air switch of the utility model.

[0050] Attached Fig.29 It is a schematic diagram of the structure of the open state of Example 7 of an air switch of the utility model.

[0051] Attached Fig.30 It is a schematic diagram of the open state structure of Example 8 of an air switch of the utility model.

[0052] Attached Fig.31 It is a schematic diagram of the semi-open state structure of Example 8 of an air switch of the utility model.

[0053] Attached Fig.32 It is a schematic diagram of the closed state structure of Example 8 of an air switch of the utility model.

[0054] Attached Fig.33 It is a structural schematic diagram of Example 9 of an air switch of the utility model.

[0055] Attached Fig.34 It is a structural schematic diagram of embodiment 10 of an air switch of the utility model.

[0056] Attached Fig.35It is a structural schematic diagram of embodiment 11 of an air switch of the utility model.

[0057] Attached Fig.36 The utility model is a schematic diagram of the overall installation structure of an air switch and earphones.

[0058] Attached Fig.37 The utility model is a schematic diagram of pressure structures of different positions of an air switch and earphones.

[0059] Attached Fig.38 It is a schematic diagram of deformation amounts of an air switch and earphones at different positions of the utility model.

[0060] Attached Fig.39 The utility model discloses an air switch and a capacitive sensing area of ​​an earphone.

[0061] Attached Fig.40 The utility model discloses an air switch and a capacitive sensing area of ​​an earphone.

[0062] Attached Fig.41 The utility model discloses an air switch and a piezoelectric sensing area of ​​an earphone.

[0063] Attached Fig.42 The utility model discloses an air switch and a piezoelectric sensing area of ​​an earphone.

[0064] Attached Fig.43 It is a schematic diagram of the push-type structure of embodiment 13 of an air switch and earphone of the utility model.

[0065] Attached Fig.44 It is a schematic diagram of the sliding structure of embodiment 13 of an air switch and earphone of the utility model.

[0066] Among them, 1-shell, 2-first air port, 3-second air port, 5-voice coil, 6-iron core, 7-positioning plate, 9-cantilever, 10-mounting plate, 11-magnet, 12-buffer; 13-first magnetic attraction part, 14-second magnetic attraction part, 15-first vibration plate, 16-second vibration plate, 17-first magnetic steel, 18-second magnetic steel, 19-fixed arm, 20-flexible arm, 21-bending notch, 22-mass block, 23-protrusion, 24-spring, 25-negative Poisson's ratio material plate, 26-telescopic arm, 27-sealing block, 28-magnetic conductive sheet, 29-magnetic conductive part, 30-magnetic fluid; 31-upper shell, 32-middle shell, 33-lower shell, 34-speaker, 35-front cavity, 36-leakage hole, 37-sound outlet hole, 38-air switch. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0068] Embodiment 1: As attached Figure 1-7 As shown, an air switch includes a housing 1, a first air port 2 and a second air port 3 are provided on the housing 1, and a plurality of first air ports 2 are provided. A mounting cavity is provided in the housing 1, and a gas channel is provided in the mounting cavity, one end of which is connected to the first air port 2 and the other end of which is connected to the second air port 3. The first air port 2 serves as an air inlet, and the second air port 3 serves as an air outlet. A voice coil assembly, a magnetic assembly, and an elastic assembly are also provided in the mounting cavity. When the voice coil assembly is energized, a magnetic field can be generated, and the magnetic field and the magnetic assembly attract or repel each other. The elastic assembly is connected to the voice coil assembly or the magnetic assembly, and can drive the voice coil assembly or the magnetic assembly connected to the elastic assembly to move when the voice coil assembly is energized, and close or open the gas channel. There are a plurality of gas channels, and the plurality of gas channels can be partially or completely closed or opened, so that the gas channel can achieve three states: completely closed, partially closed, and completely opened.

[0069] The first air port and the second air port are respectively arranged on adjacent surfaces of the shell. In this embodiment, the second air port 3 is arranged at the upper end of the shell 1, and the first air port 2 is arranged on the left and right sides of the shell 1, so that two air inlets are arranged and one air outlet is arranged, and two gas channels are formed in the shell 1, and the gas channels are located between the shell and the magnetic component. Correspondingly, the elastic component and the voice coil component or magnetic component connected to the elastic component are also arranged in two groups. Of course, the first air port 2 can also be arranged in other numbers more than two, then, correspondingly, the elastic component and the voice coil component or magnetic component connected to the elastic component are also arranged in the same number as the first air port 2 and correspond one to one with the first air port 2. In this embodiment, the elastic component is connected to the magnetic component, so the elastic component and the magnetic component are arranged in two groups, and the voice coil component is arranged in one group.

[0070] A magnetic member is provided on the housing 1, and an air inlet is provided on the magnetic member, and the air inlet and the magnetic member are provided one-to-one. In this embodiment, two air inlets are provided, which are respectively located on the left and right sides of the housing 1, and two corresponding magnetic members are also provided, namely, a first magnetic member 13 and a second magnetic member 14, which are respectively located on the left and right sides of the housing 1. The two air inlets are respectively provided on the first magnetic member 13 and the second magnetic member 14. The first magnetic member 13 and the second magnetic member 14 can both generate suction to the magnetic component, so when the voice coil component is not powered on, such as Figure 5As shown, the two magnetic components are in contact with the first magnetic component 13 and the second magnetic component 14 under the suction force of the first magnetic component 13 and the second magnetic component 14, and at the same time drive the elastic component to bend toward the corresponding first magnetic component 13 and the second magnetic component 14. Because the two air inlets are respectively arranged on the first magnetic component 13 and the second magnetic component 14, the two magnetic components completely block the two air inlets in the initial state, and the gas flow in the gas channel is zero at this time, which is a closed state.

[0071] In this embodiment, the first magnetic member 13 and the second magnetic member 14 are both metal plates. The voice coil assembly includes a voice coil 5 and an iron core 6 disposed inside the voice coil 5. The voice coil 5 is fixed at the center of the mounting cavity by positioning plates 7 on both sides. The two ends of the iron core 6 are respectively disposed toward the two air inlets. The wire of the voice coil 5 is wound around the outside of the iron core 6. The two positioning plates 7 are respectively located at the ends of the voice coil 5 close to the two air inlets.

[0072] In this embodiment, it is specified Figure 5-Figure 7 The magnetic component on the left side is the first magnetic component 13, and the magnetic component on the right side is the second magnetic component 14. The first magnetic component 13 and the second magnetic component 14 have different suction forces on the magnetic component. In this embodiment, the first magnetic component 13 and the second magnetic component 14 are made of two materials with different magnetic suction properties, so that the first magnetic component 13 and the second magnetic component 14 have different suction forces on the corresponding magnetic components. The first magnetic component 13 and the second magnetic component 14 can also be different in size and shape, so that the suction forces on the magnetic components are different. Assuming that the magnetic suction coefficient of the first magnetic component 13 is S1, the magnetic suction coefficient of the second magnetic component 14 is S2, and S1<S2, then under the same other conditions, the suction force of the first magnetic component 13 on the magnetic component is less than the suction force of the second magnetic component 14 on the magnetic component.

[0073] like Figure 4 As shown, in this embodiment, the elastic component is a vibration plate, which is installed on the housing and is located near the first air port. In this embodiment, the elastic component is located between the positioning plate 7 and the air inlet. The vibration plate is plate-shaped. The vibration plate includes cantilevers 9 at both ends and a mounting plate 10 in the middle. One end of the cantilever 9 is fixed on the housing 1, and the other end is integrally arranged with the mounting plate 10. Under the action of the cantilever 9 at both ends, the mounting plate 10 in the middle has a certain elasticity. The mounting plate 10, the air inlet and the voice coil 5 are concentrically arranged. The cantilever includes a flexible arm 20 and a fixed arm 19. The fixed arm 19 is located at the end and is used to connect with the housing 1. The flexible arm 20 is located between the fixed arm 19 and the mounting plate 10. The flexible arm 20 has different toughness from the fixed arm 19. When the flexible arm 20 is subjected to force, there are two states: open and closed. When not subjected to force, it is an intermediate state, and when subjected to force, it is a forward or backward bending state. After being subjected to force, there is only the final state, that is, the bending is completed once subjected to force. The shape of the cantilever in the vibration plate can also be as follows Figure 8-11As shown in , the connection surface between the fixed arm 19 and the flexible arm 20 has a bending notch 21. The bending notch 21 is different from the thickness of the two sides, and the stress and strain it is subjected to are different. The difference is that the fixed arm 19 does not bend, while the flexible arm 20 can be bent. It is not limited to the form shown in this embodiment, as long as it can make the mounting plate 10 bend when subjected to force and return to its original position when not subjected to force. The elastic component is provided with two groups, namely, a first vibration plate 15 located at the first magnetic suction member 13 and the air outlet, and a second vibration plate 16 located at the second magnetic suction member 14 and the air outlet. In this embodiment, the elastic force of the first vibration plate 15 and the second vibration plate 16 is the same.

[0074] The magnetic component is arranged corresponding to the voice coil component. The magnetic component is a magnetic steel. The magnetic steel is fixed on the mounting plate 10. When the magnetic steel is subjected to force, it drives the mounting plate 10 to move together. When it is not subjected to force, it drives it back to its original position under the action of the vibration plate. There are two groups of magnetic components. The corresponding magnetic steel includes a first magnetic steel 17 connected to the first vibration plate 15 and a second magnetic steel 18 connected to the second vibration plate 16. The first magnetic steel 17 and the second magnetic steel 18 are the same. In this embodiment, the first magnetic steel 17 and the second magnetic steel 18 are both installed on the side of the mounting plate 10 close to the voice coil 5. The elastic component moves close to or away from the first air port along the gas flow direction of the gas channel. A buffer 12 is provided on the side of the elastic component close to the first air port, and a buffer 12 is also provided on the side close to the voice coil 5. The buffer 12 is a plate-shaped member such as silicone, rubber or foam that can reduce the buffer force. The area of ​​the buffer 12 close to the air inlet is larger than the area of ​​the air inlet.

[0075] A voltage V1 is applied to the voice coil, and the magnetic field strength generated is B1. The suction force generated by the voice coil and the first magnetic steel 17 and the second magnetic steel 18 is the same, which is F1. The suction force generated by the first magnetic element 13 and the first magnetic steel 17 is F2, and the suction force generated by the second magnetic element 14 and the second magnetic steel 18 is F3. The elastic forces of the first vibration plate 15 and the second vibration plate 16 are both F4, and F3>F1>(F2+F4). The second magnetic steel 18 on the left side will break free from the second magnetic element 14 and move to the right under the action of the voice coil suction force F1. As the rightward movement proceeds, the suction force gradually increases until it is adsorbed to the middle positioning plate. At this time, the suction force F1 of the voice coil on the first magnetic steel 17 is greater than the suction force F2 of the first magnetic element 13 and the first magnetic steel 17 + the elastic force F4 of the first vibration plate 15. Figure 6 As shown, the air inlet on the left is open, while the right side is still in a closed state because the suction force F1 of the voice coil on the second magnetic steel 18 is less than the suction force F3 generated by the second magnetic element 14 and the second magnetic steel 18 at this time, and the closed mode is switched to the comfortable mode.

[0076] Continue to increase the power-on voltage of the voice coil to V2, and generate a magnetic field strength of B2, B2>B1. At this time, the suction force of the voice coil on the first magnetic steel 17 and the second magnetic steel 18 is F5, F5>(F3+F4)>(F2+F4), that is, the suction force of the voice coil on the first magnetic steel 17 and the second magnetic steel 18 is greater than the suction force F3 between the second magnetic element 14 and the second magnetic steel 18 + the elastic force F4 of the second vibration plate 16, and of course much greater than the suction force F2 between the first magnetic element 13 and the first magnetic steel 17 + the elastic force F4 of the first vibration plate 15. Under the action of the force, the second magnetic steel 18 on the right side will break free from the suction force of the second magnetic element 14 and move to the left. As the movement to the left progresses, the suction force gradually increases until it is adsorbed to the middle positioning plate, as shown in FIG. Figure 7 As shown, at this time, the first magnetic steel 17 and the second magnetic steel 18 are both adsorbed on their corresponding middle positioning plates. At this time, the left and right air intake holes are both in an open state, switching from the comfort mode to the transparency mode.

[0077] The above is the switch from off mode to comfort mode and then to transparent mode.

[0078] In the transparent mode, the voice coil exerts an attractive force of F7 on the first magnetic steel 17 and an attractive force of F8 on the second magnetic steel 18. When a reverse voltage V3 is applied, both the first magnetic steel 17 and the second magnetic steel 18 are subjected to repulsive forces, of which the first magnetic steel 17 is subjected to a repulsive force of F9 and the second magnetic steel 18 is subjected to a repulsive force of F10.

[0079] At this time, F10>F8, the second magnetic steel 18 overcomes the attraction with the fixing part under the action of repulsion and moves to the right. Since the magnetic attraction coefficient of the second magnetic attraction part 14 is greater than that of the first magnetic attraction part 13, the right switch is closed first, and the switch from the transparent mode to the comfortable mode is completed. The reverse voltage V4 is applied, V4>V3, and the repulsion F9 generated by the first magnetic steel 17 is greater than its own attraction F8 and then moves to the left. When it moves to the intermediate state, the first magnetic attraction part 13 gives the magnetic steel attraction and is adsorbed on the first magnetic attraction part 13. At this time, the switches on the left and right sides are both in the closed state, realizing the switch from the comfortable state to the closed state.

[0080] The voltage diagram shown is Fig.12 As shown, the voltage is not limited to square wave, sine wave, triangle wave, etc. The conversion time of each mode is in milliseconds, with fast response and extremely short switching time.

[0081] The conditions to be met for switching between modes are as follows: Fig.13 shown.

[0082] Embodiment 2: In this embodiment, the first magnetic member 13 and the second magnetic member 14 are the same, the first magnetic steel 17 and the second magnetic steel 18 are the same, so the suction force of the first magnetic member on the first magnetic steel 17 is the same as the suction force of the second magnetic member on the second magnetic steel 18. The elastic coefficient K1 of the first vibration plate 15 is less than the elastic coefficient K2 of the second vibration plate 16. The difference in elastic coefficient between the first vibration plate 15 and the second vibration plate 16 may be caused by different materials, shapes, etc., resulting in the situation that the right switch is opened first and then the left switch is opened. Switching between the closed state, the comfortable state and the transparent state is realized.

[0083] The other parts of this embodiment are the same as those of Embodiment 1 and will not be described in detail.

[0084] Embodiment 3: In this embodiment, the first magnetic attraction member 13 and the second magnetic attraction member 14 are the same, and the first vibration plate 15 and the second vibration plate 16 are the same. The magnetic coefficient M1 of the first magnetic steel 17 is greater than the magnetic coefficient M2 of the second magnetic steel 18. The difference in magnetic coefficients between the first magnetic steel 17 and the second magnetic steel 18 may be caused by the difference in magnetic force due to the different doped materials, or by the difference in shape, resulting in the situation where the right switch is opened first and then the left switch is opened. Switching between the closed state, the comfortable state and the transparent state is achieved.

[0085] The other parts of this embodiment are the same as those of Embodiment 1 and will not be described in detail.

[0086] Example 4: Figure 14-17 As shown, in this embodiment, the first air port and the second air port are respectively arranged on opposite surfaces of the housing, the second air port 3 is arranged on the upper part of the housing 1, and the first air port 2 is arranged on the lower part, and the first air port 2 and the second air port 3 are arranged in a vertical direction. The gas channel is located between the magnetic component and the voice coil component. The magnetic component is arranged corresponding to the voice coil component, and the magnetic component is a magnetic steel 11. The magnetic steel 11 is located in the installation cavity and fixedly installed around the first air port 2. In this embodiment, four magnetic steels 11 are arranged, and the first air port 2 is arranged in a rectangular shape. The four magnetic steels 11 are installed corresponding to the four sides of the first air port 2.

[0087] The elastic component is mounted on the housing and is located near the second air port. The elastic component moves toward or away from the second air port along the gas flow direction of the gas channel. A buffer is provided on the side of the elastic component near the second air port. In this embodiment, the elastic component is a vibration plate 8. The vibration plate 8 is located in the mounting cavity near the second air port 3. The vibration plate 8 includes a mounting plate 10 in the middle part and a fixed plate on the periphery. The fixed plate and the mounting plate 10 are connected by a cantilever 9. One end of the cantilever 9 is integrally provided with the mounting plate 10, and the other end is integrally provided with the fixing plate. The middle part of the cantilever 9 is bent. The fixing plate is used to install the entire vibration plate 8. The mounting plate 10 is used to install the voice coil assembly. Under the action of the cantilever 9, the middle mounting plate 10 has a certain elasticity, so that it vibrates up and down with the voice coil assembly. The voice coil assembly includes a voice coil 5, which is arranged on the side of the vibration plate 8 close to the first air port 2. The voice coil 5 is arranged concentrically with the first air port 2 and the second air port 3. The projection of the voice coil 5 in the vertical direction is located inside the projection of the air inlet in the vertical direction, so that the first air port 2 can avoid the vibration of the voice coil 5 in the vertical direction. A buffer 12 is installed on the side of the vibration plate 8 close to the second air port 3. The buffer 12 is an elastic sealing pad, which can not only buffer the collision between the vibration plate 8 and the housing 1, but also seal the second air port 3. The buffer 12 is arranged concentrically with the second air port 3. The area of ​​the buffer 12 is larger than the area of ​​the second air port 3. When the vibration plate 8 drives the buffer 12 to move toward the second air port 3, the buffer 12 can completely seal and cover the second air port 3. A conduction plate is also arranged between the vibration plate 8 and the voice coil 5. The voice coil 5 is fixed on the conduction plate. The conduction plate is electrically connected to the outside. The shape and size of the conduction plate inside the housing 1 are the same as those of the vibration plate 8. A support member is provided on the side of the fixed plate away from the conducting plate and the side of the conducting plate away from the vibration plate 8 . The support member is arranged in a ring shape and supports and fixes the vibration plate 8 and the conducting plate.

[0088] like Fig.15 As shown, when a clockwise current I1 is passed through the voice coil 5, a magnetic field is formed around the voice coil 5. When the magnetic field of the magnet 11 repels the voice coil 5, the voice coil 5 drives the vibration plate 8 to move upward under the action of the repulsive force. There is a buffer 12 above the vibration plate 8. When it contacts the housing, the airflow direction is not conductive, and there is no airflow passing through the front and back of the control unit, which is in a completely closed state.

[0089] like Fig.16 As shown, when the counterclockwise current I2 is passed through the voice coil 5, the voice coil 5 will form a magnetic field around it. When attracted by the magnetic field of the magnetic steel 11, the voice coil 5 drives the vibration plate 8 to move downward under the action of repulsion, and the gas flux of the control unit increases. Therefore, by changing the magnitude of the current, the ventilation volume of the unit can be controlled, thereby achieving a fully released state of the airflow from the first air port 2 to the second air port 3. In this embodiment, the magnitude of the clockwise current I1 is equal to the magnitude of the counterclockwise current I2.

[0090] like Fig.17 As shown, when no current is passed through the voice coil 5, there is no magnetic field around the voice coil 5, the vibration plate 8 is in a horizontal state without stress, and the ventilation volume of the control unit is half of that when it is fully released, and is in a partially closed state.

[0091] The other parts of this embodiment are the same as those of Embodiment 1 and will not be described in detail.

[0092] Example 5: Figure 18-21 As shown, in this embodiment, the voice coil 5 is arranged circumferentially at the first air port 2, and the voice coil 5 is directly conductive with the outside without the need for a conductive plate. The mounting plate 10 in the middle part of the vibration plate 8 is fixedly connected with a magnetic steel 11 near the voice coil 5. Therefore, when the voice coil 5 is energized, it can form an attractive or repulsive magnetic field with the magnetic steel 11, so that the magnetic steel 11 drives the vibration plate 8 to move downward or upward. By changing the magnitude of the current, the ventilation volume of the unit can be controlled, thereby achieving full ventilation, semi-ventilation and sealing of the airflow from the first air port 2 to the second air port 3, corresponding to the transparent state, comfortable state and sealed state.

[0093] The other parts of this embodiment are the same as those of Embodiment 4 and will not be described in detail.

[0094] Example 6: Figure 22-25 As shown, the first air port and the second air port are respectively arranged on opposite surfaces of the housing. The gas channel is located between the magnetic component and the voice coil component. In this embodiment, the first air port 2 is arranged at the bottom, and the second air port 3 is arranged at the top. A voice coil component is arranged on one side of the mounting cavity close to the first air port 2, and the voice coil component includes a voice coil 5. A magnetic component is arranged on one side close to the second air port 3, and both sides of the magnetic component are mounted on the housing 1 through an elastic component, and the magnetic component is a magnetic steel 11.

[0095] A mass block 22 is arranged outside the magnetic steel 11, and the mass block 22 wraps the magnetic steel 11. When the voice coil 5 is energized, it can form an attractive or repulsive magnetic field with the magnetic steel 11, so that the magnetic steel 11 drives the mass block 22 to move left or right, so that the mass block 22 closes or opens the second air port 3, and realizes a conductive or sealed state.

[0096] Multiple magnetic components and voice coil components are provided, and the magnetic poles of adjacent magnetic components are in opposite directions. The magnetic poles of adjacent voice coil components generated by power-on are in opposite directions. The elastic component slides along the second air port perpendicular to the gas flow direction of the gas channel. In this embodiment, two magnetic steels 11 are provided, and three voice coils 5 are provided. The three voice coils 5 are respectively located between the two first air ports 2 and at both ends. The voice coils 5 at both ends are wound in opposite directions to the middle voice coil 5, so that the magnetic poles of adjacent voice coils 5 are opposite when power is turned on. Two groups of magnetic steels 11 are provided, and the two groups of magnetic steels 11 are located on one side of the mass block 22 close to the first air port 2. In this embodiment, the magnetic steel 11 is installed in the mass block 22, and the two magnetic steels 11 are arranged side by side in the horizontal direction, and the magnetic poles of the two magnetic steels 11 are installed in opposite directions. The magnetic component and the voice coil component are arranged alternately.

[0097] In this embodiment, a plurality of second gas ports 3 are provided, and the mass block 22 is provided with protrusions 23 corresponding to the second gas ports 3 one by one.

[0098] The elastic component is a spring piece 24. In this embodiment, the spring piece 24 is V-shaped.

[0099] The voice coil 5 is passed through a current I to form a Fig.24 In the magnetic field shown, the magnet 11 will move to the right under the action of magnetic force, and the ventilation volume of the unit will gradually decrease with the increase of current until it is completely closed. At this time, the airflow direction is not conductive, and there is no airflow passing through the front and back of the control unit, which is in a completely closed state.

[0100] When the voice coil 5 is not energized, the mass block 22 is in the state of Fig.23 The equilibrium state shown in the figure is that the ventilation volume is half of that when it is fully released, and is in a semi-closed state.

[0101] The voice coil 5 is passed through a reverse current -I to form a Fig.25 In the magnetic field shown, the magnet 11 will move to the left under the action of the magnetic force, and the ventilation volume inside the unit will gradually increase until the ventilation volume reaches the maximum, and it is in a fully ventilated state.

[0102] Example 7: Figure 26-29 As shown, the first gas port and the second gas port are respectively arranged on opposite surfaces of the housing. In this embodiment, the first gas port is arranged at the bottom, and the second gas port is arranged at the top. The elastic component is arranged near the second gas port. The elastic component slides along the second gas port perpendicular to the gas flow direction of the gas channel. Two groups of elastic components are arranged, and the two groups of elastic components can be close to or away from each other. A sealing member is arranged on the side where the two groups of elastic components are close to each other, and the sealing member is deformed to control the opening and closing of the second gas port, thereby controlling the ventilation volume of the gas channel.

[0103] The voice coil assembly includes a voice coil 5, which is fixed in the circumference of the first air port 2. In this embodiment, the elastic component is a negative Poisson's ratio material plate 25, which is made of a negative Poisson's ratio material. The negative Poisson's ratio material plate 25 is located in the installation cavity near the second air port 3. The negative Poisson's ratio material plate 25 is fixed to the top of the housing 1 through a support. There are two negative Poisson's ratio material plates 25, and a gap is left between the two negative Poisson's ratio material plates 25. The gap connects the first air port 2 and the second air port 3, so that there is only one gas channel in the installation cavity. In this embodiment, the negative Poisson's ratio material plate serves as both an elastic component and a sealing member. The magnetic material is a magnetic steel 11, and two magnetic steels 11 are provided. The two magnetic steels 11 correspond to the two negative Poisson's ratio material plates 25 one by one, respectively, and the magnetic steel 11 is fixed to the side of the negative Poisson's ratio material plate 25 near the first air port 2. In this embodiment, the negative Poisson's ratio material plate 25 and the magnetic steel 11 are fixed together to form a negative Poisson's ratio material-magnetic material structure, or a three-layer structure of magnetic material-negative Poisson's ratio material-magnetic material, or a multi-layer structure of two materials.

[0104] like Fig.28 As shown, when the voice coil 5 is passed through a current I, a magnetic field is formed around the voice coil 5. At this time, the magnetic steel 11 will be attracted by the voice coil 5. Because the control plate of the negative Poisson's ratio material is fixed together with the magnetic steel 11, the control plate will also be pulled. The negative Poisson's ratio material will expand. At this time, the gas flux decreases until the ventilation volume is zero, and it is in a completely closed state.

[0105] like Fig.29 As shown, when the voice coil 5 is passed with current -I, a magnetic field is formed around the voice coil 5. At this time, the magnetic steel 11 will be repelled by the voice coil 5, and the control board will be under pressure. The negative Poisson's ratio material will shrink, and the gas flux will increase until the ventilation volume reaches the maximum, and it is in a fully open state.

[0106] like Fig. 27 As shown, when no current flows through the voice coil 5, the ventilation volume is half of that when it is fully opened, and is in a semi-closed state.

[0107] The other parts of this embodiment are the same as those of Embodiment 6 and will not be described in detail.

[0108] Example 8: Figure 30-32 As shown, in this embodiment, the elastic component is a telescopic arm 26, which is located in the installation cavity near the second gas port 3. The telescopic arm 26 is rhombus-shaped, and two telescopic arms 26 are provided, which are respectively located on both sides of the second gas port 3. The ends of the two telescopic arms 26 close to each other are provided with sealing blocks 27, which serve as sealing members. A gap is left between the two sealing blocks 27, and the gap connects the first gas port 2 and the second gas port 3, so that there is only one gas passage in the installation cavity.

[0109] like Fig.32As shown, when current is passed through the voice coil 5, a magnetic field is formed around the voice coil 5. When the magnet 11 is repelled by the voice coil 5, the telescopic arm 26 is pulled and becomes elongated, driving the sealing block 27 to move toward the middle. At this time, the air flux decreases until it is sealed and the ventilation volume is zero. At this time, it is in a completely closed state.

[0110] like Fig.30 As shown, when the magnetic steel 11 is attracted by the voice coil 5, the telescopic arm 26 is pulled, and its shape becomes wider and narrower, driving the sealing block 27 to move to both sides. At this time, the gas flux increases until the ventilation volume reaches the maximum, and it is in a fully open state.

[0111] like Fig.31 As shown, when no current flows through the voice coil 5, the ventilation volume is half of that when it is fully opened, and is in a semi-closed state.

[0112] Therefore, by changing the current, the ventilation volume of the gas channel can be controlled, thereby achieving full ventilation, semi-ventilation and airtightness from the first air port 2 to the second air port 3, corresponding to a transparent state, a comfortable state and a closed state.

[0113] The other parts of this embodiment are the same as those of Embodiment 7 and will not be described in detail.

[0114] Example 9: Fig.33 As shown, the first air port and the second air port are respectively arranged on adjacent surfaces of the housing. In this embodiment, the second air port 3 is arranged at the upper part, and the first air port 2 is arranged at the side. The elastic component is installed on the housing and is located near the first air port. The elastic component moves close to or away from the first air port along the gas flow direction of the gas channel. A buffer is arranged on the side of the elastic component close to the first air port. The magnetic component is arranged corresponding to the voice coil component, a magnetic suction component is arranged on the housing, the first air port is arranged on the magnetic suction component, and the first air port is arranged with one. The magnetic suction component, the elastic component and the magnetic component are all arranged one by one with the first air port. The voice coil assembly includes a voice coil 5 and an iron core 6. The voice coil 5 is located at one end of the mounting cavity away from the first air port 2. The voice coil 5 is wound on the iron core 6. The magnetic component includes a magnetic steel 11. The magnetic steel 11 is located between the second air port 3 and the first air port 2. A magnetic conductive sheet 28 is installed at one end of the iron core 6 close to the magnetic steel 11, and the magnetic field generated by the voice coil 5 can be concentrated at one end of the magnetic conductive sheet 28. A magnet 11 is placed at a certain distance from the magnetic sheet 28. The elastic component is a vibration plate 8. The magnet 11 is fixed on the vibration plate 8, which can drive the magnet 11 to move left and right. A buffer 12 is bonded to the outside of the magnet 11 and the magnetic sheet 28. A magnetic attraction 4 is designed on the right side of the magnetic sheet 28, which can attract the magnet 11 at a small distance and keep it still. The magnetic attraction 4 is a metal plate. The housing 1 is made of non-magnetic material. The gas channel is located between the housing and the magnetic component.

[0115] When the voice coil 5 is passed through a clockwise current, the magnetic field generated is S on the left and N on the right. At this time, the magnetic conductive sheet 28 gathers N, and a repulsive force is generated with the magnetic steel 11, pushing the magnetic steel 11 to move to the right. When it moves to a certain distance, the ventilation volume of the gas channel decreases until the first gas port is partially opened. At this time, the gas channel is partially released. The voice coil current continues to increase until the magnetic attraction component 4 magnetically attracts the magnetic steel 11. At this time, the first gas port 2 is in a blocked state, and the ventilation volume from the first gas port 2 to the gas outlet is zero. The first gas port is closed and the gas channel is closed. The voice coil 5 is powered off. Due to the existence of the magnetic attraction component 4, the magnetic steel 11 can still maintain the attracted state with the magnetic attraction component 4. When the voice coil 5 is passed through a counterclockwise current, the magnetic field generated is N on the left and S on the right. At this time, the magnetic sheet 28 and the magnet 11 generate an attractive force, which will overcome the attractive force between the magnet 11 and the magnetic element 4, and the magnet 11 will move to the left. When the magnet 11 moves to the left to a certain distance, the magnet 11 will be attracted to the magnetic sheet 28 on the left. At this time, the voice coil 5 is powered off, and the magnet 11 can still maintain the attracted state with the magnetic sheet 28. At this time, the air intake and the air outlet are greater than the air intake when not powered on and stationary. Due to the existence of the magnetic element 4, the state can be maintained when not powered on, saving electricity and extending the standby time.

[0116] The other parts of this embodiment are the same as those of Embodiment 1 and will not be described in detail.

[0117] Example 10: Fig.34 As shown, in this embodiment, the magnetic component is a magnet 11, and the magnet 11 is located in the middle of the installation cavity. The elastic component is a vibration plate 8, and two vibration plates 8 are provided. Both sides of the magnet 11 are installed on the housing 1 through the vibration plates 8. The voice coil component wraps the voice coil 5, and the magnet 11 is placed in the middle of the voice coil 5. There is a gap between the voice coil 5 and the magnet 11. A buffer 12 is fixed on the side of the vibration plate 8 away from the magnet 11 to buffer and reduce noise during contact. A magnetic suction member 4 is provided on the housing 1 at a position corresponding to the buffer 12. The magnetic suction member 4 can generate suction and attract the magnet 11, and the first air port 2 is provided on one of the magnetic members. The housing 1 is made of a material that is not magnetically attractive.

[0118] When the voice coil 5 is passed through a clockwise current, a magnetic field with N on the left and S on the right is generated. Since the magnetic steel 11 is placed inside the voice coil 5, the direction of the magnetic field of the magnetic steel 11 is the same as the magnetic field generated by the energized coil. The voice coil 5 and the magnetic steel 11 generate a repulsive force to drive the magnetic steel 11 to move to the left. When it moves to a certain distance, the ventilation volume of the gas channel decreases until the first air port is partially opened. At this time, the gas channel is partially released. If the voice coil current is continued to increase, the magnetic steel 11 and the magnetic suction component 4 are attracted, and the air inlet is blocked. At this time, the air inlet does not allow external gas to enter. At this time, the unit gas flux is zero, which is a closed state. When the voice coil 5 is powered off, the suction force of the magnetic steel 11 and the magnetic suction component 4 can still ensure the attracted state. When the voice coil 5 is supplied with counterclockwise current, the voice coil 5 exerts an attractive force on the magnet 11. The attractive force between the voice coil 5 and the magnet 11 overcomes the attractive force between the magnet 11 and the magnetic element 4. The magnet 11 moves to the right. When it moves to a certain distance from the magnetic element 4, the magnet 11 is attracted to the magnetic element 4 on the other side. The voice coil 5 is powered off, but the attracted state can still be maintained. In this state, the gas flux becomes larger.

[0119] This solution can achieve three states of completely sealed, partially released, and completely opened. Due to the presence of the left and right magnetic suction parts 4, the state can be maintained when not powered, saving power and extending the standby time.

[0120] The other parts of this embodiment are the same as those of Embodiment 1 and will not be described in detail.

[0121] Example 11: Fig.35 As shown, the first air port and the second air port are respectively arranged on opposite surfaces of the housing. In this embodiment, the first air port 2 and the second air port 3 are arranged on the housing 1 along the vertical direction. The magnetic assembly and the voice coil assembly are arranged alternately. In this embodiment, one group of magnetic assemblies is arranged, and two groups of voice coil assemblies are arranged. The magnetic poles generated by the two groups of voice coil assemblies when energized are opposite in direction.

[0122] The voice coil assembly includes a voice coil 5 and an iron core 6. Two voice coils 5 are provided, which are respectively located on both sides of the installation cavity. An iron core 6 is installed inside the voice coil 5. The ends of the two iron cores 6 close to each other are both installed with a magnetic conductive sheet 28. One end of the iron core 6 is connected to the magnetic conductive sheet 28, and the other end is connected to the housing 1. When the voice coil is energized, a magnetic field can be generated and guided out through the magnetic conductive sheet 28. The magnetic assembly includes a magnetic steel 11. There is one magnetic steel 11. The magnetic steel 11 is arranged between the two magnetic conductive sheets 28. The magnetic steel 11 is at a certain distance from the magnetic conductive sheets 28 on the left and right sides. The left and right sides of the magnetic steel 11 are fixedly connected with a buffer 12 to provide a buffer force for the magnetic steel 11 to collide with the magnetic conductive sheet 28 and reduce the generation of noise. The elastic assembly is a vibration plate 8. The vibration plate 8 is located above the magnetic steel 11 and provides resistance to the left and right movement of the magnetic steel 11. A magnetic conductive member 29 is arranged below the magnetic steel 11. A magnetic fluid 30 is injected into the middle position of the end of the magnetic conductive member 29 close to the first air port 2.

[0123] In the initial state, the magnetic steel 11 is located at the first air port 2, the gas flux is zero, and it is in a closed state; the magnetic field generated by the clockwise current on the left voice coil 5 is N on the left and S on the right. At this time, the magnetic field generates attraction with the magnetic steel 11 through the gathering effect of the magnetic conductive sheet 28, and the magnetic steel 11 moves to the left until the first air port 2 is half open, and the gas flux is half of the fully released state, which is a semi-open state. The current continues to increase until it is attracted to the left magnetic conductive sheet 28, and then the voice coil 5 is powered off. At this time, due to the magnetic attraction of the magnetic conductive sheet 28 itself, the attraction can still be maintained, and it is in an open state. When the right voice coil is powered on, it generates attraction with the magnetic steel 11. When the magnetic steel 11 moves to the right, the gas flux gradually decreases until it is closed.

[0124] The magnetic fluid here not only has a sealing function, but also has a lubricating function during the movement process.

[0125] The other parts of this embodiment are the same as those of Embodiment 6 and will not be described in detail.

[0126] Example 12: Fig.36 As shown, an earphone comprises an upper shell 31, a middle shell 32 and a lower shell 33, a speaker 34 is installed in the cavity surrounded by the lower shell 33 and the upper shell 31, a front cavity 35 is formed between the speaker 34 and the upper shell 31, a leakage hole 36 and a sound outlet hole 37 connected to the front cavity 35 are provided on the upper shell 31, an air switch is installed at the leakage hole 36, wherein a first air port 2 (i.e., an air inlet) of the air switch 38 is connected to the front cavity 35, and a second air port 3 (i.e., an air outlet) is connected to the leakage hole 36.

[0127] When entertainment and privacy protection are needed, the air switch is in the off state, which solves the problem of sound leakage in the front cavity of the earphone, reduces ambient noise and also has good low-frequency performance.

[0128] The fully closed and fully released states of the air switch correspond to the closed mode and transparent mode of the earphone, and the partially released state of the air switch corresponds to the sports mode of the earphone.

[0129] When you are outdoors, you need to have entertainment and listen to the outdoor environment sounds. At this time, the air switch is in a semi-open state, which not only meets the entertainment needs, but also allows you to listen to the outdoor environment sounds while ensuring safety.

[0130] When the air switch is fully open, it is in a transparent state, which reduces the pressure inside the ear and makes it more comfortable to wear.

[0131] In this embodiment, the switching of the earphone state is achieved by induction. The induction area is set on the middle shell 32, which can be a capacitive or piezoelectric induction area. By pressing, tapping, etc., the distance between the diaphragm and the plate of the capacitor or the shape of the piezoelectric sheet is changed to change the voltage.

[0132] like Figure 37-38 As shown, the pressure F1 is the force applied to the headphone handle. Different positions cause different deformations to the headphone handle. Displacement: 0-X4, X4-X3, X3-X2, X2-X1. Each displacement interval can sense its corresponding signal value. The induced voltage is an interval value, not a certain value.

[0133] Depending on the amount of deformation, the change in capacitance is different, generating four different voltage signals. The signals are amplified by the amplifier circuit and collected and processed by the chip, corresponding to the four voltage signals V1, V2, V3, and V4 respectively.

[0134] like Figure 39-40 The sensing area is capacitive. When your finger presses or taps the sensing area, the distance between the diaphragm and the plate changes, the capacitance value changes, and the voltage value is sensed. After the signal is amplified, different modes are switched according to the preset voltage value.

[0135] like Figure 41-42 The sensing area is voltage type. When your finger presses or taps the sensing area, the piezoelectric film bends to varying degrees, inducing different voltage values. After amplifying the signal, different modes are switched according to the preset voltage value.

[0136] Example 13: Figure 43-44 As shown, in this embodiment, the switching mode is sliding or pressing, and a sliding or pressing button is set on the middle shell 32. The off mode, comfort mode, and transparent mode are three-in-one switches. By sliding the button or pressing the button, you can switch freely among the three modes. In the process of switching to each gear, the voltage is converted to achieve the mode switching state.

[0137] The other parts of this embodiment are the same as those of Embodiment 12 and will not be described in detail.

[0138] Embodiment 14: In this embodiment, the switching mode is voice-based. The signal is switched by issuing voice commands. The built-in microphone picks up the voice commands, and the mode signal is converted into a digital signal. The off state, comfortable state, and transparent state correspond to command 1, command 2, and command 3, respectively. The voice command can be conducted by the body through the bone conduction microphone, or it can be transmitted through the air to the built-in microphone of the headset.

[0139] The other parts of this embodiment are the same as those of Embodiment 12 and will not be described in detail.

Claims

1. An air switch, characterized in that: The invention comprises a shell, wherein a gas passage with openings at both ends, a voice coil assembly, a magnetic assembly and an elastic assembly are arranged in the shell. The voice coil assembly can generate a magnetic field when energized, and the magnetic field attracts or repels the magnetic assembly. The elastic assembly is connected to the voice coil assembly and / or the magnetic assembly, and the position of the voice coil assembly and / or the magnetic assembly changes to change the ventilation volume of the gas passage.

2. An air switch according to claim 1, characterized in that: The gas channel is located between the magnetic assembly and the voice coil assembly, or between the housing and the voice coil assembly or the magnetic assembly.

3. An air switch according to claim 1, characterized in that: One end of the gas channel is a first gas port, and the other end is a second gas port. There is at least one first gas port and at least one second gas port. The first gas port and the second gas port are respectively arranged on opposite or adjacent surfaces of the shell.

4. An air switch according to claim 3, characterized in that: The elastic component is installed on the shell and is located near the first gas port or the second gas port. The elastic component moves toward or away from the first gas port or the second gas port along the gas flow direction of the gas channel. A buffer is provided on one side of the elastic component near the first gas port or the second gas port.

5. An air switch according to claim 3, characterized in that: The elastic component is mounted on the housing and is located near the first gas port or the second gas port. The elastic component slides along the first gas port or the second gas port perpendicular to the gas flow direction of the gas channel.

6. An air switch according to claim 5, characterized in that: The elastic components are provided in two groups, and the two groups of the elastic components can be close to or far away from each other. A sealing member is provided on the side where the two groups of the elastic components are close to each other. The sealing member moves to control the switching condition of the first gas port and / or the second gas port so as to control the ventilation volume of the gas channel.

7. An air switch according to any one of claims 3 to 5, characterized in that: The magnetic component is arranged corresponding to the voice coil component, a magnetic attraction component is arranged on the shell, the first air port or the second air port is arranged on the magnetic attraction component, a plurality of the first air port or the second air port are arranged, and the magnetic attraction component, the elastic component and the magnetic component or the voice coil component are all arranged one-to-one corresponding to the first air port or the second air port.

8. An air switch according to any one of claims 2 to 5, characterized in that: The magnetic components and the voice coil components are arranged alternately, and there are multiple magnetic components and / or voice coil components. The magnetic poles of adjacent magnetic components or the magnetic poles generated by adjacent voice coil components when powered on are in opposite directions.

9. An air switch according to claim 8, characterized in that: There are multiple magnetic assemblies and / or voice coil assemblies, the magnetic poles of adjacent magnetic assemblies are in opposite directions, and the magnetic poles generated by adjacent voice coil assemblies when energized are in opposite directions.

10. An earphone, characterized in that: It comprises an upper shell, a middle shell and a lower shell and the air switch in the above claim, a speaker is installed in the cavity surrounded by the lower shell and the upper shell, a front cavity is formed between the speaker and the upper shell, the upper shell is provided with a leakage hole connected to the front cavity, the air switch is installed at the leakage hole, wherein the first air port of the air switch is connected to the front cavity, the second air port is connected to the leakage hole, and the state of the earphone is switched to induction type, sliding type, push type or voice type.

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