Acoustic switch and electronic equipment

Abstract

The utility model relates to an acoustic switch and an electronic device, and the acoustic switch comprises a magnetic conductive housing which is internally provided with an accommodation cavity; a first sound hole and a second sound hole are formed in the magnetic conduction shell, and the first magnetic conduction piece and the second magnetic conduction piece are fixed in the containing cavity; the coil is wound outside the second magnetic conductive piece; the movable assembly is movably arranged in the containing cavity, the movable assembly comprises a third magnetic conductive part, a magnet and a sound insulation plate, the sound insulation plate is a non-magnetic conductive plate, and a sound hole channel is formed in the sound insulation plate; the movable assembly has a first position and a second position, when the movable assembly is in the first position, the third magnetic conductive part and the first magnetic conductive part are attracted, the sound insulation plate blocks the first sound hole, and the first sound hole and the second sound hole are not communicated, and when the movable assembly is in the second position, the third magnetic conductive part and the second magnetic conductive part are attracted, and the first sound hole is communicated with the second sound hole through the sound hole channel. The utility model also relates to electronic equipment. According to the utility model, the switching of the opening / closing state of the sound switch can be flexibly and reliably realized, and the energy consumption of the sound switch is reduced.

Description

Technical Field

[0001] The utility model relates to an acoustic device, in particular to an acoustic switch and electronic equipment. Background Art

[0002] Existing acoustic switches generally include a housing, a valve core, a coil, and a spring element within the housing. The valve core is connected to the housing via the spring element. When the coil is energized, the magnetic force generated drives the valve core, opening or closing the valve seat and switching the acoustic switch on and off. The spring element guides the valve core's movement. However, the valve core movement in this acoustic switch is not very flexible, and the spring element is prone to fatigue damage, which is not conducive to ensuring the reliability of the acoustic switch. Furthermore, the coil must remain energized to maintain the switch open or closed, resulting in high energy consumption and insufficient performance. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to improve the reliability of the sound switch in the prior art and reduce energy consumption.

[0004] In order to solve the above technical problems, the utility model provides an acoustic switch, comprising:

[0005] A magnetically conductive shell having an accommodating cavity therein; a first sound hole and a second sound hole are provided on the magnetically conductive shell, and the first sound hole and the second sound hole are both connected to the accommodating cavity;

[0006] a first magnetic conductive member, the first magnetic conductive member being fixedly connected to the magnetic conductive housing and located inside the accommodating cavity;

[0007] a second magnetic conductive member, the second magnetic conductive member being fixedly connected to the magnetic conductive housing and located inside the accommodating cavity;

[0008] a coil, the coil being wrapped around the outside of the second magnetic conductive member;

[0009] A movable component is movably disposed in the accommodating cavity, the movable component includes a third magnetic conductive member, the third magnetic conductive member is located between the first magnetic conductive member and the second magnetic conductive member, an end of the third magnetic conductive member close to the first magnetic conductive member is sequentially connected to a magnet and a sound insulation board, the magnet is located outside the first magnetic conductive member, the magnetic poles of the magnet are distributed along the movement direction of the movable component, the sound insulation board is a non-magnetic conductive board, and a sound duct is provided on the sound insulation board;

[0010] The movable component has a first position and a second position. When the coil is energized, the movable component switches between the first position and the second position. In the first position, the third magnetic conductive member and the first magnetic conductive member are attracted to each other, the sound insulation board blocks the first sound hole, and the first sound hole and the second sound hole are not connected. In the second position, the third magnetic conductive member and the second magnetic conductive member are attracted to each other, and the first sound hole is connected to the second sound hole through the sound channel.

[0011] The distance between the third magnetic conductive member and the first magnetic conductive member is a first distance, and the distance between the third magnetic conductive member and the second magnetic conductive member is a second distance. In the first position, the first distance is smaller than the second distance, and in the second position, the first distance is larger than the second distance.

[0012] In one embodiment of the present invention, at the first position, the first spacing is 0.02-0.2 mm.

[0013] In one embodiment of the present invention, an isolation plate is connected to a side of the second magnetic conductive member close to the third magnetic conductive member, and the isolation plate is a non-magnetic conductive plate. The isolation plate is located above the coil.

[0014] In one embodiment of the present invention, the thickness of the isolation plate is the same as the first distance in the first position.

[0015] In one embodiment of the present invention, the width of the isolation plate is greater than the width of the second magnetic conductive member.

[0016] In one embodiment of the present invention, the acoustic switch further comprises a non-magnetic sealing member, which is fixedly connected to the magnetic shell and located inside the accommodating cavity; the first magnetic member is located inside the sealing member; a transition hole is provided on the sealing member, the transition hole is connected to the first sound hole, and the transition hole is located between the sound duct and the first sound hole; in the first position, the third magnetic member and the first magnetic member are attracted to each other, the sound insulation board blocks the transition hole, and the first sound hole and the second sound hole are not connected; in the second position, the third magnetic member and the second magnetic member are attracted to each other, and the first sound hole is connected to the second sound hole after passing through the transition hole and the sound duct in sequence.

[0017] In one embodiment of the present invention, a first mounting hole is provided on the sealing member, a second mounting hole is provided on the sound insulation board, the first magnetic conductive member extends out of the first mounting hole toward one end of the third magnetic conductive member and extends into the second mounting hole, and the second mounting hole and the first magnetic conductive member can slide relative to each other.

[0018] In one embodiment of the present invention, the sound hole is provided on the outer peripheral edge of the sound insulation board, and the sound hole is provided with an opening on a side facing the magnetic conductive shell.

[0019] In one embodiment of the present invention, there are multiple magnets, and the multiple magnets surround the outside of the first magnetic conductive component.

[0020] In one embodiment of the present invention, a first through hole is provided in the middle of the magnet, and the first through hole is movably sleeved on the first magnetic conductive member.

[0021] In one embodiment of the present invention, the movable component is driven to switch between the first position and the second position by applying currents of different directions to the coil; or, the acoustic switch includes two coils, which are arranged in sequence along the height direction of the second magnetic conductive member, and one of the two coils drives the movable component to switch from the first position to the second position after being energized, and the other drives the movable component to switch from the second position to the first position after being energized.

[0022] In one embodiment of the present invention, the housing includes a first housing and a second housing, and the first housing is connected to an upper portion of the second housing.

[0023] The utility model also discloses an electronic device, comprising the acoustic switch according to any one of the above claims.

[0024] The above technical solution of the utility model has the following advantages compared with the prior art:

[0025] The acoustic switch and electronic device described in the present invention can flexibly and reliably realize the switching of the on / off state of the sound switch; in addition, the coil only needs to be energized at the moment of switching the state, and can maintain a stable on / off state without power after the state switching is completed, which has good stability and greatly reduces the energy consumption of the acoustic switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0027] Figure 1 This is a three-dimensional structural diagram of the acoustic switch of the utility model;

[0028] Figure 2 is a diagram of the internal structure of an acoustic switch according to an embodiment;

[0029] Figure 3 is an assembled cross-sectional view of the sound insulation board, the magnetic conductive shell and the first magnetic conductive member;

[0030] Figure 4 yes Figure 3 An exploded view of the acoustic switch is shown;

[0031] Figure 5 It is an exploded view of 4 active components;

[0032] Figure 6 yes Figure 4 A cross-sectional view of the acoustic switch when the movable component is in a first position (the acoustic switch is in a closed state);

[0033] Figure 7 yes Figure 4 A cross-sectional view of the acoustic switch when the movable component is in the second position (acoustic switch is in the open state)

[0034] Figure 8 is an exploded view of an acoustic switch according to another embodiment (dual coil);

[0035] Figure 9 yes Figure 8 A cross-sectional view of the acoustic switch when the movable component is in a first position (the acoustic switch is in a closed state);

[0036] Figure 10 yes Figure 8 A cross-sectional view of the acoustic switch shown with the movable component in a second position (the acoustic switch is in an open state);

[0037] Description of the accompanying drawings:

[0038] 10. Magnetic shell; 101. Accommodating cavity; 102. First sound hole; 103. Second sound hole; 104. First shell; 105. Second shell;

[0039] 20. A first magnetic conductive member;

[0040] 30. Second magnetic conductive member;

[0041] 40. Coil;

[0042] 50, movable component; 501, third magnetic conductive member; 502, magnet; 503, sound insulation board; 5031, sound duct; 5032, second mounting hole;

[0043] 60. Isolation plate; 70. Sealing member; 701. Transition hole; 702. First mounting hole. DETAILED DESCRIPTION

[0044] The present invention is further described below with reference to the accompanying drawings and specific embodiments to enable those skilled in the art to better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. It is apparent that the embodiments described are only some of the embodiments of the present disclosure, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present disclosure, its application, or use.

[0045] In the description of the present invention, it should be understood that the terms "vertical", "upper", "lower", "top", "side", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0046] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] Example 1

[0048] See Figures 1-8 , this embodiment discloses an acoustic switch, including a magnetic conductive housing 10, a first magnetic conductive member 20, a second magnetic conductive member 30, a coil 40 and a movable component 50;

[0049] The magnetic housing 10 has an accommodating cavity 101 therein; a first sound hole 102 and a second sound hole 103 are provided on the magnetic housing 10, and both the first sound hole 102 and the second sound hole 103 are connected to the accommodating cavity 101;

[0050] The first magnetic conductive member 20 is fixedly connected to the magnetic conductive housing 10 and is located inside the accommodating cavity 101;

[0051] The second magnetic conductive member 30 is fixedly connected to the magnetic conductive housing 10 and is located inside the accommodating cavity 101;

[0052] The coil 40 is wound around the outside of the second magnetic conductive member 30 to generate an induced magnetic field when the coil 40 is energized. The coil 40 is a hollow coil 40 and can be wound with copper wire.

[0053] The movable component 50 is movably disposed in the accommodating cavity 101. Figure 2 and Figure 4 As shown, the movable assembly 50 includes a third magnetic conductive member 501, which is located between the first magnetic conductive member 20 and the second magnetic conductive member 30. The end of the third magnetic conductive member 501 closest to the first magnetic conductive member 20 is sequentially connected to a magnet 502 and a sound insulation board 503. The magnet 502 is located outside the first magnetic conductive member 20. The magnetic poles of the magnet 502 are distributed along the movement direction of the movable assembly (the vertical direction in the figure, for example, the upper magnetic pole of the magnet 502 is the north pole, and the lower magnetic pole is the south pole). The sound insulation board 503 is a non-magnetic board and is provided with a sound duct 5031 to connect the first sound hole 102 and the second sound hole 103.

[0054] The sound insulation board 503 is a non-magnetic board, which can avoid the sound insulation board 503 and the magnetic housing 10 from generating attraction, so that the movable component 50 can be driven more flexibly and freely.

[0055] The first sound hole 102 and the second sound hole 103 are both through holes.

[0056] The movable component 50 has a first position and a second position. When the coil 40 is energized, the movable component 50 switches between the first position and the second position.

[0057] In the first position, if Figure 6 As shown, the third magnetic conductive member 501 and the first magnetic conductive member 20 are attracted to each other, the sound insulation board 503 blocks the first sound hole 102, and the first sound hole 102 and the second sound hole 103 are not connected. In the second position, as shown Figure 7 As shown, the third magnetic conductive member 501 and the second magnetic conductive member 30 are attracted to each other, and the first sound hole 102 is connected to the second sound hole 103 through the sound channel 5031, so that sound can be transmitted;

[0058] The distance between the third magnetic conductive member 501 and the first magnetic conductive member 20 is a first distance h1, and the distance between the third magnetic conductive member 501 and the second magnetic conductive member 30 is a second distance h2. In the first position, as shown in FIG. Figure 6 As shown, the first spacing h1 is smaller than the second spacing h2. At the second position, as shown in FIG. Figure 7 As shown, the first distance h1 is greater than the second distance h2.

[0059] The magnetic conductive housing 10 , the first magnetic conductive component 20 , the second magnetic conductive component 30 , and the third magnetic conductive component 501 are all made of magnetic conductive materials.

[0060] By applying currents in different directions to the coil 40 , the movable component 50 can be driven to switch between the first position and the second position;

[0061] One of the first sound hole 102 and the second sound hole 103 serves as a sound inlet, and the other serves as a sound outlet. When the acoustic switch is in the off state, the movable component 50 is in the first position, such as Figure 6 As shown, the third magnetic conductive member 501 and the first magnetic conductive member 20 are attracted to each other, and the sound insulation board 503 blocks the first sound hole 102, thereby blocking the communication between the first sound hole 102 and the second sound hole 103, so that the sound cannot be transmitted;

[0062] When the sound switch needs to be switched from the off state to the on state, the coil 40 is energized to generate a magnetic field, and a magnetic circuit of the magnetic field is formed between the magnetic housing, the first magnetic member 20 and the second magnetic member 30 (( Figure 7 (The magnetic circuit is indicated by the dotted line with an arrow in the figure), the first magnetic member 20 and the second magnetic member 30 are both magnetized. After magnetization, the polarity of the adjacent ends of the first magnetic member 20 and the second magnetic member 30 is opposite. For example, when the lower end of the first magnetic member 20 is magnetized to the S pole, the upper end of the second magnetic member 30 is magnetized to the N pole. Conversely, when the lower end of the first magnetic member 20 is magnetized to the N pole, the upper end of the second magnetic member 30 is magnetized to the S pole. As the direction of the current flowing into the coil 40 changes, the polarity of the magnetized lower end of the first magnetic member 20 and the upper end of the second magnetic member 30 also changes accordingly.

[0063] Specifically, the third magnetic conductive member 501 will be magnetized by the magnet 502. If the upper portion of the magnet 502 is the N pole and the lower portion is the S pole, the third magnetic conductive member 501 will be magnetized to the S pole. When the coil 40 passes the positive current, Figure 7 As shown ( Figure 7 (The magnetic circuit is indicated by the dotted line with an arrow in the figure). The lower end of the first magnetic conductive member 20 is magnetized to the S pole by the magnetic circuit, and the upper end of the second magnetic conductive member 30 is magnetized to the N pole. At this time, the first magnetic conductive member 20 exerts a repulsive force on the third magnetic conductive member 501, and the second magnetic conductive member 30 exerts an attractive force on the third magnetic conductive member 501, thereby driving the movable component 50 to move downward as a whole until it reaches the second position. At this time, a gap appears between the sound insulation plate 503 and the first sound hole 102, causing the first sound hole 102 to open, and the first sound hole 102 and the sound channel 5031 on the sound insulation plate 503 are connected. At this time, external sound can enter through the first sound hole 102 and be transmitted to the second sound hole 103 through the sound channel 5031 on the sound insulation plate 503. At this point, the sound switch is in the on state, as shown in FIG. Figure 7 As shown ( Figure 7The dotted line with an arrow indicates the magnetic circuit, and the solid line with an arrow indicates the sound transmission path);

[0064] When the sound switch needs to be switched from the on state to the off state, a reverse current is passed through the coil 40. Figure 6 As shown ( Figure 6 ), the lower end of the first magnetic conductive member 20 is magnetized to the N pole by the magnetic circuit, the upper end of the second magnetic conductive member 30 is magnetized to the S pole, and the third magnetic conductive member 501 still maintains the S pole. At this time, the first magnetic conductive member 20 exerts an attractive force on the third magnetic conductive member 501, and the second magnetic conductive member 30 exerts a repulsive force on the third magnetic conductive member 501, thereby driving the movable component 50 to move upward as a whole until it reaches the first position. At this time, the sound insulation board 503 blocks the first sound hole 102, so that the first sound hole 102 is closed, and the sound channel 5031 on the first sound hole 102 and the sound insulation board 503 are isolated. The first sound hole 102 and the second sound hole 103 are no longer connected. At this time, the external sound cannot be transmitted in the shell. At this point, the sound switch is in the off state. Figure 6 shown.

[0065] By means of the above structure, the on / off state switching of the sound switch can be realized flexibly and reliably. In addition, the coil 40 only needs to be energized at the moment of switching state, and can maintain a stable on / off state without being energized after the state switching is completed. The distance between the third magnetic conductive member 501 and the first magnetic conductive member 20 is defined as the first distance, and the distance between the third magnetic conductive member 501 and the second magnetic conductive member 30 is defined as the second distance. After the coil 40 is powered off, the first magnetic conductive member 20 and the second magnetic conductive member 30 lose their magnetism, but the third magnetic conductive member 501 is magnetized by the magnet 502 and still has magnetism, which will generate an attractive force on the first magnetic conductive member 20 and the second magnetic conductive member 30, and the closer the distance is, the greater the attractive force is. When the movable component 50 reaches the first position (see Figure 6 ), the sound switch is in the off state. Since the first distance h1 is smaller than the second distance h2 at this time, after the coil 40 is powered off, the attraction between the third magnetic member 501 and the first magnetic member closer to it is greater, so that the movable component 50 can be maintained in the first position; similarly, when the movable component 50 reaches the second position (see Figure 7 ), the sound switch is in the on state. Since the first distance h1 is greater than the second distance h2, after the coil 40 is de-energized, the attraction between the third magnetic conductive member 501 and the closer second magnetic conductive member 30 is greater, thereby maintaining the movable assembly 50 in the second position. This design ensures that the sound switch can remain stable in its current state even after the coil 40 is de-energized.

[0066] Also, since the coil 40 only needs to be energized at the moment of switching states and does not need to be energized after the state switching is completed, it can better reduce power consumption, reduce power consumption, and effectively improve battery life and user experience.

[0067] In some embodiments, the sound insulation board 503 may be made of metal or non-metal non-magnetic material, such as copper, titanium alloy, ceramic, plastic, etc. The magnet 502 is made of permanent magnetic material.

[0068] A clearance fit may be adopted between the sound insulation board 503 and the inner wall of the magnetic shell 10 so that the movable component 50 can move up and down flexibly.

[0069] The sound insulation board 503, the magnet and the third magnetic conductive member 501 can be fixed by welding or bonding.

[0070] The first magnetic conductive member 20 and the second magnetic conductive member 30 can be fixed to the magnetic conductive housing 10 by welding or bonding.

[0071] In some embodiments, when the movable component 50 is in the first position, the above-mentioned first spacing h1 is 0.02 to 0.2 mm, so that there is a certain gap between the third magnetic conductive component 501 and the first magnetic conductive component 20. The existence of this gap can effectively prevent the third magnetic conductive component 501 and the first magnetic conductive component 20 from being sucked together when the acoustic switch is in the closed state.

[0072] Furthermore, an isolation plate 60 is connected to the side of the second magnetic conductive part 30 close to the third magnetic conductive part 501. The isolation plate 60 is a non-magnetic plate. The isolation plate 60 is located above the coil 40. The setting of the non-magnetic isolation plate 60 can prevent the third magnetic conductive part 501 and the second magnetic conductive part 30 from direct contact and the occurrence of suction.

[0073] Preferably, the thickness of the isolation plate 60 is the same as the size of the first spacing when in the first position, and the size of the first spacing is also the smallest when in the first position; specifically, for example, if the first spacing h1 is 0.1 mm when in the first position, then the thickness of the isolation plate 60 is also 0.1 mm, so as to better ensure that in the first position, the first spacing is smaller than the second spacing, and in the second position, the first spacing is larger than the second spacing, the holding force of the acoustic switch is the same in the first position and the second position, and the driving force required for switching states is also the same.

[0074] It is understandable that in actual working conditions, due to the existence of processing errors / assembly errors, the thickness of the isolation plate 60 and the size of the first interval can be roughly close.

[0075] In some preferred embodiments, Figure 4 and Figure 6As shown in the figure, the left and right directions are the width directions, the width L1 of the isolation plate 60 is greater than the width L3 of the second magnetic conductive part 30, and the width L1 of the isolation plate 60 is less than the width L2 of the third magnetic conductive part 501, that is, L3<L1<L2, so that when the movable component 50 is in the second position, the movable component 50 has a larger support surface, thereby better preventing the movable component 50 from tilting and improving the attraction stability.

[0076] It is understandable that in another embodiment, the width L1 of the isolation plate 60 may be greater than or equal to the width L2 of the third magnetic conductive member 501 , that is, L3 < L1 and L1 ≥ L2.

[0077] The isolation plate 60 can be made of a non-magnetic material such as metal or non-metal. Preferably, the isolation plate 60 can be made of plastic, rubber or foam material with a certain elasticity to reduce noise while isolating the second magnetic conductive member 30 and the third magnetic conductive member 501.

[0078] In some preferred embodiments, the acoustic switch further includes a non-magnetic sealing member 70, which is fixedly connected to the magnetic housing 10 and located inside the accommodating cavity 101. The first magnetic conductive member 20 is located inside the sealing member 70. The sealing member 70 is provided with a transition hole 701, which communicates with the first sound hole 102 and is located between the sound channel 5031 and the first sound hole 102.

[0079] In the first position, the third magnetic conductive member 501 and the first magnetic conductive member 20 are attracted to each other, the sound insulation board 503 blocks the transition hole 701, and the first sound hole 102 and the second sound hole 103 are not connected. In the second position, the third magnetic conductive member 501 and the second magnetic conductive member 30 are attracted to each other, and the first sound hole 102 is connected to the second sound hole 103 after passing through the transition hole 701 and the sound channel 5031 in sequence, so that the sound can enter the shell from the first sound hole 102, and be transmitted to the first sound hole 102 through the sound channel 5031 and then output.

[0080] The sealing member 70 is fixed on the magnetic housing 10 instead of on the movable assembly 50 , which can effectively reduce the weight of the movable assembly 50 and make the movement of the movable assembly 50 more flexible.

[0081] Preferably, the sealing member 70 can be made of a non-metallic material with a certain elasticity, such as plastic, rubber or foam material, which can provide a sealing function while reducing the noise caused by switching.

[0082] The sealing member 70 may be connected to the inner wall of the magnetic conductive housing 10 by bonding.

[0083] The transition hole 701 and the first sound hole 102 may have the same specifications, and their axes may coincide.

[0084] In some embodiments, a first mounting hole 702 can be provided on the sealing member 70, a second mounting hole 5032 can be provided on the sound insulation board 503, and the first magnetic conductive member 20 extends out of the first mounting hole 702 toward one end of the third magnetic conductive member 501 and extends into the second mounting hole 5032. The first magnetic conductive member 20 can slide relative to the second mounting hole 5032 when the movable component 50 moves, so as to better ensure the sliding stability of the movable component 50.

[0085] Preferably, Figure 3 and Figure 5 As shown, the outer peripheral edge of the sound insulation board 503 is provided with the sound channel 5031, and the sound channel 5031 is provided with an opening on a side facing the magnetic guide shell 10, that is, the sound channel 5031 is in the form of an open groove.

[0086] In some embodiments, there are multiple magnets 502 , and the multiple magnets 502 surround the outside of the first magnetic conductive component 20 . In this case, the magnets 502 may be rectangular, fan-shaped, or in other shapes.

[0087] In other embodiments, a single magnet 502 may be provided, with a first through-hole defined in the center. The first magnetic conductive member 20 may be slidably connected to the first through-hole after passing through the sound insulation board 503. In other words, the magnet 502 surrounds the exterior of the first magnetic conductive member 20. For example, if the sound insulation board 503 is provided with a second mounting hole 5032, the first mounting hole 702 and the first through-hole may together form a sliding channel, allowing the first magnetic conductive member 20 to slide relatively within the sliding channel.

[0088] In some embodiments, the shell includes a first shell 104 and a second shell 105, the first sound hole 102 is set on the first shell 104, and the second sound hole 103 is set on the second shell 105. The axes of the first sound hole 102 and the second sound hole 103 are parallel or coincident, which is easier to process and more conducive to ensuring the effect of sound transmission.

[0089] The first shell 104 and the second shell 105 can be connected together by welding or bonding.

[0090] Furthermore, a plurality of first sound holes 102 may be provided on the first shell 104 , and a plurality of second sound holes 103 may be correspondingly provided on the second shell 105 ; at this time, if a seal 70 is provided, the transition holes 701 on the seal 70 correspond one to one with the first sound holes 102 .

[0091] The structure of the acoustic switch is more compact, and is more suitable for meeting the needs of small or miniaturization. For example, the length, width and height can all be less than about 3 mm, and the specific dimensions can be manufactured according to actual needs.

[0092] The acoustic switch of the above embodiment can flexibly and reliably realize the switching of the on / off state of the sound switch, and can realize the switching with a smaller driving voltage, which is more flexible; in addition, the coil only needs to be energized at the moment of switching the state, and can maintain a stable on / off state without power after the state switching is completed. It has good stability and greatly reduces the energy consumption of the acoustic switch, effectively improving the battery life.

[0093] Example 2

[0094] like Figures 8-10 As shown, the main difference between this embodiment and the first embodiment is that the acoustic switch includes two coils 40, which are arranged in sequence along the height direction of the second magnetic conductive member 30. When energized, one of the two coils 40 drives the movable component 50 to switch from the first position to the second position, and when energized, the other coil drives the movable component 50 to switch from the second position to the first position. Figure 9 is a state diagram when the movable component 50 is in the first position, at which time the acoustic switch is in the closed state; Figure 10 is a state diagram when the movable component 50 is in the second position, at which time the acoustic switch is in the open state;

[0095] That is, the two coils are not energized at the same time. When energized, a forward current is passed through one coil to achieve the switching of the acoustic switch from the open state to the closed state. When energized, a reverse current is passed through the other coil to achieve the switching of the acoustic switch from the closed state to the open state. The principle is basically the same as the principle of passing positive and negative currents through a single coil to achieve switch switching in the embodiment, and will not be repeated here.

[0096] Example 3

[0097] This embodiment discloses an electronic device, including the acoustic switch described in any of the above embodiments.

[0098] The above-mentioned electronic devices can be headphones, hearing aids, sound-emitting wearable devices and sound-emitting electronic products, etc. Through the above-mentioned acoustic switch structure, the ear-blocking effect can be improved or eliminated, the call quality can be improved, and the wearing and usage experience of the product can be improved.

[0099] Electronic devices equipped with the above-mentioned acoustic switch can also effectively eliminate the ear-blocking effect. For example, in-ear headphones and hearing aids are both acoustic devices that are inserted into the human ear canal when in use. The above-mentioned in-ear devices can isolate the ear canal from the outside world, forming a relatively closed space in the ear canal, so their noise isolation effect and acoustic performance are good. 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 speech to feel hollow, uncomfortable, or too loud. To eliminate the ear-blocking effect, a channel connecting the ear canal and the outside world is often opened on the in-ear device, and an acoustic switch is also set on the in-ear device. The acoustic switch can be turned on and off according to the situation, thereby opening or closing the channel. For example, when listening to music, the acoustic switch is turned off, making the ear canal relatively closed; when the wearer speaks, the acoustic switch is turned on, connecting the ear canal to the outside world to eliminate the ear-blocking effect. The acoustic switches of the above-mentioned embodiments can flexibly and reliably realize the switching between the on / off state, which can better eliminate the ear-blocking effect.

[0100] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present invention, that is, any multiple embodiments can be combined to meet the needs of different application scenarios. They are all within the scope of protection of this application and will not be described in detail here.

[0101] It should be noted that the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An acoustic switch, characterized in that: include, A magnetically conductive shell having an accommodating cavity therein; a first sound hole and a second sound hole are provided on the magnetically conductive shell, and the first sound hole and the second sound hole are both connected to the accommodating cavity; a first magnetic conductive member, the first magnetic conductive member being fixedly connected to the magnetic conductive housing and located inside the accommodating cavity; a second magnetic conductive member, the second magnetic conductive member being fixedly connected to the magnetic conductive housing and located inside the accommodating cavity; a coil, the coil being wrapped around the outside of the second magnetic conductive member; A movable component is movably disposed in the accommodating cavity, the movable component includes a third magnetic conductive member, the third magnetic conductive member is located between the first magnetic conductive member and the second magnetic conductive member, an end of the third magnetic conductive member close to the first magnetic conductive member is sequentially connected to a magnet and a sound insulation board, the magnet is located outside the first magnetic conductive member, the magnetic poles of the magnet are distributed along the movement direction of the movable component, the sound insulation board is a non-magnetic conductive board, and a sound duct is provided on the sound insulation board; The movable component has a first position and a second position. When the coil is energized, the movable component switches between the first position and the second position. In the first position, the third magnetic conductive member and the first magnetic conductive member are attracted to each other, the sound insulation board blocks the first sound hole, and the first sound hole and the second sound hole are not connected. In the second position, the third magnetic conductive member and the second magnetic conductive member are attracted to each other, and the first sound hole is connected to the second sound hole through the sound channel. The distance between the third magnetic conductive member and the first magnetic conductive member is a first distance, and the distance between the third magnetic conductive member and the second magnetic conductive member is a second distance. In the first position, the first distance is smaller than the second distance, and in the second position, the first distance is larger than the second distance.

2. The acoustic switch according to claim 1, wherein: In the first position, the first spacing is 0.02-0.2 mm.

3. The acoustic switch according to claim 2, wherein: An isolation plate is connected to a side of the second magnetic conductive member close to the third magnetic conductive member. The isolation plate is a non-magnetic conductive plate and is located above the coil.

4. The acoustic switch according to claim 3, wherein: The thickness of the isolation plate is the same as the first distance in the first position.

5. The acoustic switch according to claim 3, wherein: The width of the isolation plate is greater than the width of the second magnetic conductive member.

6. The acoustic switch according to claim 1, wherein: The invention also includes a non-magnetic sealing member, which is fixedly connected to the magnetic shell and located inside the accommodating cavity. The first magnetic conductive member is located inside the sealing member. A transition hole is provided on the sealing member, which is connected to the first sound hole. The transition hole is located between the sound duct and the first sound hole. When in the first position, the third magnetic conductive member and the first magnetic conductive member are attracted to each other, the sound insulation board blocks the transition hole, and the first sound hole and the second sound hole are not connected. When in the second position, the third magnetic conductive member and the second magnetic conductive member are attracted to each other, and the first sound hole is connected to the second sound hole after passing through the transition hole and the sound duct in sequence.

7. The acoustic switch according to claim 6, characterized in that : A first mounting hole is provided on the sealing member, a second mounting hole is provided on the sound insulation plate, the first magnetic conductive member extends out of the first mounting hole toward one end of the third magnetic conductive member and extends into the second mounting hole, and the second mounting hole and the first magnetic conductive member can slide relative to each other.

8. The acoustic switch according to claim 1, wherein: The sound hole is provided on the outer peripheral edge of the sound insulation board, and the sound hole is provided with an opening on one side facing the magnetic conductive shell.

9. The acoustic switch according to claim 1, wherein: There are multiple magnets, and the multiple magnets surround the outside of the first magnetic conductive component.

10. The acoustic switch according to claim 1, wherein: A first through hole is provided in the middle of the magnet, and the first through hole is movably sleeved on the first magnetic conductive member.

11. The acoustic switch according to claim 1, wherein: The movable component is driven to switch between the first position and the second position by applying currents of different directions to the coil; or, the acoustic switch includes two coils, which are arranged in sequence along the height direction of the second magnetic conductive part, and one of the two coils drives the movable component to switch from the first position to the second position after being energized, and the other coil drives the movable component to switch from the second position to the first position after being energized.

12. The acoustic switch according to claim 1, wherein: The housing includes a first housing and a second housing, wherein the first housing is connected to an upper portion of the second housing.

13. An electronic device, characterized in that: Comprising the acoustic switch according to any one of claims 1-12.

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