Overhanging bone conduction device

Abstract

The application provides a cantilever bone conduction device, which comprises a T-shaped iron, a magnet, a voice coil, an attracting piece, a first vibrating plate and a second vibrating plate. The magnet is arranged around the center column of the T-shaped iron and is spaced apart from the center column by a certain distance. The voice coil is arranged between the center column of the T-shaped iron and the magnet. The first vibrating plate is rigidly connected with the center column of the T-shaped iron to form a cantilever from inside to outside. The second vibrating plate is connected with the first vibrating plate and forms a vibrating gap with the first vibrating plate. The voice coil generates a changing magnetic field when electrified, so that the attracting and repelling action of the T-shaped iron of the magnetic circuit assembly on the attracting piece drives the second vibrating plate to vibrate and the center column and the first vibrating plate to vibrate. The vibrating directions of the first vibrating plate and the second vibrating plate are opposite, and the amplitudes are superposed, so that the vibration amplitude of the magnetic circuit assembly is improved, and the sound sensitivity and frequency width effect are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bone conduction, and particularly relates to a cantilever type bone conduction device. BACKGROUND

[0002] Bone conduction is a way of sound wave conduction to the inner ear, which directly causes the cochlea to produce hearing by making the outer cochlea vibrate and exciting the cochlea spiral to produce hearing, so that the user wearing the bone conduction device can hear the sound. In the prior art, the bone conduction device is usually vibrated by a single vibrating diaphragm through the interaction of a magnetic circuit mechanism and a vibrating mechanism to transmit sound waves. This transmission mode makes it difficult for the vibrating diaphragm to realize a larger vibration range, thereby making it difficult to realize a better bass effect. SUMMARY

[0003] Therefore, it is necessary to provide a cantilever type bone conduction device which can improve the vibration range of a vibrating diaphragm to realize a better bass effect.

[0004] The application provides a cantilever type bone conduction device, which comprises:

[0005] a magnetic circuit assembly, the magnetic circuit assembly comprises a T-shaped iron, a magnet and a voice coil, the magnet is annularly arranged on the side of a center column of the T-shaped iron and is spaced apart from the center column by a certain distance, and the voice coil is at least partially suspended between the center column and the magnet and is spaced apart from the T-shaped iron and the magnet by a certain distance;

[0006] a first vibrating diaphragm, the first vibrating diaphragm is rigidly connected with the center column, wherein the thickness of the first vibrating diaphragm is 0.1-5 mm;

[0007] a second vibrating diaphragm, the second vibrating diaphragm is connected with the first vibrating diaphragm and forms a vibration gap with the first vibrating diaphragm, and a suction piece is arranged on the second vibrating diaphragm, the voice coil is electrified to drive the second vibrating diaphragm to vibrate through the suction piece of the magnetic circuit assembly, wherein the side of the second vibrating diaphragm is at least partially connected with the shell to make the magnetic circuit assembly and the first vibrating diaphragm in a suspended state, and the thickness of the second vibrating diaphragm is 0.1-5 mm.

[0008] Further, the suction piece is arranged opposite to the center column.

[0009] Further, the distance between the suction piece and the end face of the center column is adjustable.

[0010] Further, the first vibrating diaphragm and the second vibrating diaphragm are connected through a height limiting connecting piece, wherein the height of the height limiting connecting piece is adjustable, so that the distance between the first vibrating diaphragm and the second vibrating diaphragm is adjustable.

[0011] Further, a plurality of the height limiting connectors are arranged between the first vibrating plate and the second vibrating plate, wherein distances between the plurality of the height limiting connectors and the axis of the center column are equal.

[0012] Further, the height limiting connector comprises a first connecting part, a second connecting part and a height limiting part, the first connecting part and the second connecting part are arranged on opposite sides of the height limiting part, the first connecting part is connected with the first vibrating plate, and the second connecting part is connected with the second vibrating plate.

[0013] Further, the height limiting connector is a bidirectional screw rod.

[0014] Further, an end of the center column is provided with an annular stepped surface, and the first vibrating plate is sleeved on the annular stepped surface.

[0015] Further, a side of the first vibrating plate close to the second vibrating plate is not higher than an end surface of the center column.

[0016] Further, the voice coil is connected to a side of the first vibrating plate away from the second vibrating plate.

[0017] Compared with the prior art, the present application has the following beneficial effects: the first vibrating plate is rigidly connected with the center column, the second vibrating plate is connected with the first vibrating plate at a certain distance and forms a vibration gap with an end surface of the center column, the second vibrating plate is provided with an attracting part, the voice coil is energized to drive the second vibrating plate to vibrate through the attracting part and drive the first vibrating plate to vibrate through the center column, and the periphery of the second vibrating plate is at least partially connected with the shell to make the magnetic circuit assembly and the first vibrating plate in a suspended state, so as to increase the vibration amplitude of the magnetic circuit assembly, increase the vibration amplitude of the first vibrating plate and the second vibrating plate, and improve the sensitivity and frequency width of the sound. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole diagram of the embodiment of the present application.

[0019] Figure 2 It is a diagram of the embodiment of the T iron of the present application.

[0020] Figure 3 It is a diagram of one embodiment of the second vibrating plate of the present application.

[0021] Figure 4 It is a diagram of another embodiment of the second vibrating plate of the present application.

[0022] Figure 5A schematic view of a specific embodiment of the second vibrating piece of the present application.

[0023] Figure 6 A schematic view of a specific embodiment of the first vibrating piece of the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. It can be understood that the drawings are only provided for reference and illustration, and are not used to limit the present application. The connection relationship shown in the drawings is only for the purpose of clear description, and does not limit the connection mode.

[0025] It should be noted that when one component is considered to be "connected" to another component, it can be directly connected to the other component, or a middle component can exist at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs. It should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0026] It should be noted that in the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] Please refer to Figures 1-2The application provides a cantilever bone conduction device 100, comprising a magnetic circuit assembly 10, a first vibrating plate 20 and a second vibrating plate 30, the magnetic circuit assembly 10 is connected with the first vibrating plate 20, the first vibrating plate 20 is connected with the second vibrating plate 30, and the magnetic circuit assembly 10 drives the first vibrating plate 20 and the second vibrating plate 30 to vibrate.

[0028] The magnetic circuit assembly 10 comprises a T-shaped iron 11, a magnet 12 and a voice coil 13, the magnet 12 is annularly arranged on the side of a center column 111 of the T-shaped iron 11 and is spaced apart from the center column 111 by a certain distance, and the voice coil 13 is at least partially suspended between the center column 111 and the magnet 12 and is spaced apart from the T-shaped iron 11 and the magnet 12 by a certain distance.

[0029] The first vibrating plate 20 is rigidly connected with the center column 111, and the voice coil 13 is connected on the side of the first vibrating plate 20 away from the second vibrating plate 30. In an embodiment, the middle position of the first vibrating plate 20 is rigidly connected with the end face 1111 of the center column 111.

[0030] In another embodiment, the middle position of the first vibrating plate 20 is provided with a connecting hole 21 corresponding to the center column 111, the center column 111 is provided with an annular stepped surface 1112 corresponding to the connecting hole 21, the connecting hole 21 is sleeved on the center column 111, and the first vibrating plate 20 is rigidly connected with the center column 111 through the stepped surface 1112.

[0031] The connection between the center column 111 and the first vibrating plate 20 includes but is not limited to bonding, welding, screw locking and the like.

[0032] In other embodiments, the first vibrating plate 20 can also be threadedly connected with the center column 111.

[0033] Preferably, the side of the first vibrating plate 20 close to the second vibrating plate 30 is not higher than the end face 1111 of the center column 111.

[0034] The second vibrating plate 30 is connected with the first vibrating plate 20 and forms a vibration gap with the end face 1111 of the center column 111, and the second vibrating plate 30 is provided with an attracting piece 40, and the voice coil 13 is energized to drive the second vibrating plate 30 to vibrate through the attracting piece 40.

[0035] The side of the second vibrating plate 30 is at least partially connected with a shell (not shown) to make the magnetic circuit assembly 10 and the first vibrating plate 20 in a suspended state.

[0036] Preferably, the second vibrating plate has an area greater than that of the first vibrating plate, so that the second vibrating plate extends outwardly and is connected to the shell.

[0037] Referring to Figure 3 In one embodiment, the second vibrating plate 30 is provided with an annular protrusion 31 at the portion between the attracting member 40 and the shell.

[0038] The annular protrusion 31 can be a protrusion towards the first vibrating plate 20 or a protrusion away from the first vibrating plate 20.

[0039] Preferably, the annular protrusion 31 is in an arc shape.

[0040] Referring to Figure 4 In another embodiment, the second vibrating plate 30 is provided with a wave-shaped annular structure 32 at the portion between the attracting member 40 and the shell, so as to increase the vibration amplitude of the second vibrating plate 30.

[0041] Preferably, the second vibrating plate 30 is further provided with a first through hole 321 at the wave-shaped annular structure 32, so as to further increase the vibration amplitude of the second vibrating plate 30.

[0042] Referring to Figures 5-6 and in combination with Figures 1-2 The attracting member 40 is arranged opposite to the center column 111, so that the magnetic circuit assembly 10 has a greater attracting force on the second vibrating plate 30.

[0043] In one embodiment, the attracting member 40 is fixedly arranged at the center of the second vibrating plate 30.

[0044] In another embodiment, the attracting member 40 is threadedly connected to the second vibrating plate 30, so that the distance between the attracting member 40 and the end surface 1111 of the center column 111 is adjustable.

[0045] Preferably, the attracting member 40 is arranged at the side of the second vibrating plate 30 close to the first vibrating plate 20.

[0046] The first vibrating plate 20 and the second vibrating plate 30 are connected through a height-limiting connecting member 50.

[0047] Preferably, a plurality of height-limiting connecting members 50 are arranged between the first vibrating plate 20 and the second vibrating plate 30. The distance between the plurality of height-limiting connecting members 50 and the axis of the center column 111 is equal.

[0048] In an embodiment, at least two height-limiting connectors 50 are arranged between the first vibrating plate 20 and the second vibrating plate 30.

[0049] The height-limiting connector 50 comprises a height-limiting portion 51, and a first connecting portion 52 and a second connecting portion 53 arranged on opposite sides of the height-limiting portion 51, wherein the first connecting portion 52 is connected to the first vibrating plate 20, and the second connecting portion 53 is connected to the second vibrating plate 30.

[0050] Preferably, the height-limiting connector 50 is adjustable in height, so that the distance between the first vibrating plate 20 and the second vibrating plate 30 is adjustable.

[0051] In an embodiment, the first connecting portion 52 is threadedly connected to the first vibrating plate 20, and the second connecting portion 53 is rotationally connected to the second vibrating plate 30.

[0052] In another embodiment, the first connecting portion 52 is rotationally connected to the first vibrating plate 20, and the second connecting portion 53 is threadedly connected to the second vibrating plate 30.

[0053] In other embodiments, the height-limiting connector 50 is a bidirectional screw. The first connecting portion 52 and the second connecting portion 53 correspond to a thread of the bidirectional screw, so that the first connecting portion 52 is threadedly connected to the first vibrating plate 20, and the second connecting portion 53 is threadedly connected to the second vibrating plate 30.

[0054] Preferably, the distance between the first vibrating plate 20 and the second vibrating plate 30 is adjustable between 0.05-10mm by adjusting the height-limiting connector 50.

[0055] The thickness of the first vibrating plate 20 is between 0.1-5mm, so that different thicknesses of the first vibrating plate 20 can provide different vibration amplitudes under the action of the magnetic circuit assembly 10.

[0056] In an embodiment, the thickness of the first vibrating plate 20 is 0.1mm.

[0057] In another embodiment, the thickness of the first vibrating plate 20 is 5mm.

[0058] The thickness of the second vibrating plate 30 is between 0.1-5mm, so that different thicknesses of the second vibrating plate 30 can provide different vibration amplitudes under the action of the magnetic circuit assembly 10.

[0059] In an embodiment, the thickness of the second vibrating plate 30 is 0.1mm.

[0060] In another embodiment, the thickness of the second vibrating reed 30 is 5mm.

[0061] Further, the first vibrating reed 20 and the second vibrating reed 30 can be further provided with a second through hole 60. The second through hole 60 can be one or multiple.

[0062] Preferably, the first vibrating reed 20 and the second vibrating reed 30 can be grid-shaped, so as to further improve the amplitude of the first vibrating reed 20 and the second vibrating reed 30 under the action of the magnetic circuit assembly 10.

[0063] In the specification and claims of the present application, the words "comprise / comprising" and the words "have / having" and their conjugates, are used to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof.

[0064] Some features of the present application are described in different embodiments for the sake of clarity, however, these features can also be combined in a single embodiment. Conversely, some features of the present application are described in a single embodiment for the sake of brevity, however, these features can also be separately or in any suitable combination in different embodiments.

[0065] The above description is merely preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall fall within the scope of the present application.

Claims

1. A cantilever bone conduction device, characterized by, The application relates to a magnetic circuit assembly, a first vibrating plate and a second vibrating plate. The magnetic circuit assembly comprises a T-shaped iron, a magnet and a voice coil, the magnet is arranged around the center column of the T-shaped iron and is spaced apart from the center column, and the voice coil is at least partially suspended between the center column and the magnet and is spaced apart from the T-shaped iron and the magnet. The first vibrating plate is rigidly connected with the center column, and the thickness of the first vibrating plate is 0.1-5 mm. The second vibrating plate is connected with the first vibrating plate and forms a vibrating gap with the first vibrating plate, and the second vibrating plate is provided with an attracting piece, the voice coil is electrified to drive the second vibrating plate to vibrate through the attracting piece of the magnetic circuit assembly, the area of the second vibrating plate is larger than that of the first vibrating plate, the periphery of the second vibrating plate is at least partially connected with a shell to make the magnetic circuit assembly and the first vibrating plate in a suspended state, the thickness of the second vibrating plate is 0.1-5 mm, and the voice coil is connected to the side of the first vibrating plate away from the second vibrating plate.

2. The cantilever bone conduction device according to claim 1, wherein, The attracting piece is arranged opposite to the center column.

3. The cantilever bone conduction device of claim 2, wherein, The distance between the attracting piece and the end surface of the center column is adjustable.

4. The cantilever bone conduction device of claim 3, wherein, The first vibrating plate and the second vibrating plate are connected through a height-limiting connecting piece, the height of the height-limiting connecting piece is adjustable, and the distance between the first vibrating plate and the second vibrating plate is adjustable.

5. The cantilever bone conduction device of claim 4, wherein, A plurality of height-limiting connecting pieces are arranged between the first vibrating plate and the second vibrating plate, and the distance between the height-limiting connecting pieces and the axis of the center column is equal.

6. The cantilever bone conduction device of claim 5, wherein, The height-limiting connecting piece comprises a first connecting part, a second connecting part and a height-limiting part, the first connecting part and the second connecting part are arranged on the opposite sides of the height-limiting part, the first connecting part is connected with the first vibrating plate, and the second connecting part is connected with the second vibrating plate.

7. The cantilever bone conduction device of claim 5, wherein, The height-limiting connecting piece is a bidirectional screw rod.

8. The cantilever bone conduction device of claim 1, wherein, The end of the center column is provided with an annular stepped surface, and the first vibrating plate is sleeved on the annular stepped surface.

9. The cantilever bone conduction device of claim 8, wherein, The side of the first vibrating plate close to the second vibrating plate is not higher than the end surface of the center column.

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