Bone conduction vibrator and electronic equipment

Abstract

The present invention discloses a bone conduction vibrator and an electronic device, which relate to the field of acoustic technology. The bone conduction vibrator includes a shell assembly, a permanent magnetic circuit system, two coils, a magnetic plate assembly and a reset assembly. The shell assembly is made of a magnetic conductive material; the permanent magnetic circuit system is arranged in the shell assembly, and the permanent magnetic circuit system includes an iron component and a magnet assembly, and the magnet assembly includes two magnets with opposite poles; the coil is arranged in the shell assembly, and the two coils are respectively located on both sides of the permanent magnetic circuit system; the magnetic plate assembly includes two magnetic plates respectively inserted into the two coils, and the magnetic plates extend between the two magnets of the magnet assembly, and the adjacent ends of the two magnetic plates are not directly magnetically connected; the reset assembly is connected between the magnetic plate assembly and the permanent magnetic circuit system, and includes a spring for providing elastic force. The driving force and sensitivity of the bone conduction vibrator of the present invention are better.

Description

Technical Field

[0001] The present invention relates to the field of acoustic technology, and in particular to a bone conduction vibrator and electronic equipment. Background Art

[0002] A bone conduction transducer, also known as a bone conduction speaker, is a transducer that converts electrical signals into mechanical vibrations of a corresponding frequency. The mechanical vibrations generated by the transducer are transmitted through the skull to the auditory center, enabling hearing. Bone conduction transducers are widely used in wearable electronic devices such as headphones, hearing aids, smart helmets, and smart glasses.

[0003] The Chinese patent publication number CN202334867U discloses a moving iron microphone unit for bone conduction hearing aids and speaker devices, which includes a vibration conduction device, an armature, a diaphragm, two magnetic cores, two magnet sheets and an electromagnetic induction coil. The armature is inserted into the electromagnetic induction coil and located between the two magnet sheets. The fixed end of the armature, the magnetic core, the magnet sheet and the electromagnetic induction coil are fixed together, and the free end of the armature is connected to the vibration conduction device. When the coil is energized, the armature is polarized and interacts with the magnetic field of the magnet sheet, causing the driving magnet mechanism composed of the armature, the magnetic core, the magnet sheet and the electromagnetic induction coil to produce vibration displacement, thereby realizing bone conduction sound transmission.

[0004] The aforementioned balanced armature microphone unit utilizes the weight of the drive magnet mechanism itself to achieve bone conduction sound transmission, eliminating the need for an additional weight-adding module on the diaphragm, thereby simplifying the product structure. However, there are still some areas that need improvement.

[0005] For example, the resetting of the above-mentioned moving-iron microphone unit depends on the elasticity of the armature, and the stiffness coefficient of the armature is relatively large, resulting in poor overall sensitivity (especially low-frequency sensitivity).

[0006] For example, since the armature is fixed at one end and suspended at the other end, when vibrating, the driving magnet mechanism is difficult to reliably perform linear motion relative to the free end (i.e., the suspended end). Instead, it is closer to swinging around the free end as a fulcrum. The vibration efficiency is relatively low, which easily leads to a deterioration in the listening effect.

[0007] For another example, its driving magnet mechanism needs to drive the diaphragm to vibrate, which increases the resistance and is not conducive to increasing the driving force and sensitivity of bone conduction sound transmission.

[0008] In short, the above structure still has room for improvement in terms of sound effect, sensitivity improvement and vibration stability.

[0009] The above content is only used to help understand the technical solution of this application and does not constitute an admission that the above is prior art.

[0010] Therefore, it is necessary to improve the prior art to overcome the above defects.

[0011] The above content is only used to help understand the technical solution of this application and does not constitute an admission that the above is prior art. Summary of the Invention

[0012] The object of the present invention is to provide a bone conduction vibrator and an electronic device to improve their sensitivity.

[0013] To achieve the above-mentioned object of the invention, the present invention provides a bone conduction vibrator, comprising:

[0014] A housing component, wherein the housing component is made of a magnetic conductive material;

[0015] A permanent magnetic circuit system is provided in the housing assembly, the permanent magnetic circuit system includes an ferrite assembly and two groups of magnet assemblies, the magnet assemblies form a magnetic circuit through the ferrite assembly, and each group of magnet assemblies includes two magnets with opposite poles arranged opposite to each other;

[0016] Two coils are provided in the housing assembly, and the two coils are respectively located on both sides of the permanent magnet magnetic circuit system;

[0017] A magnetic conductive plate assembly, comprising two magnetic conductive plates respectively disposed within the two coils, wherein the magnetic conductive plates extend between two magnets of the magnet assembly adjacent to the coils through which the magnetic conductive plates are disposed, and adjacent ends of the two magnetic conductive plates are not directly magnetically connected; and

[0018] The reset assembly is connected between the magnetic plate assembly and the permanent magnetic circuit system, and includes a spring for providing elastic force.

[0019] In another aspect, the present invention provides an electronic device comprising the bone conduction vibrator as described above.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] According to some embodiments of the present invention, a bone conduction vibrator includes two magnet assemblies and two coils. The two coils and two magnet assemblies work together to cause the magnetic plate assembly and the permanent magnet circuit system to vibrate relative to each other, thereby increasing driving force and enhancing sensitivity. Furthermore, the housing assembly is made of a magnetically conductive material. The magnetic field generated by energizing the coils forms a magnetic circuit through the housing assembly, improving magnetic field utilization and further enhancing driving force and sensitivity. Furthermore, the use of springs to provide a restoring force allows for a lower overall stiffness coefficient (K value), which helps reduce the low-frequency resonant frequency (low-frequency F0) of the vibration system, resulting in higher low-frequency sensitivity and better bass. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the bone conduction vibrator in some embodiments of the present invention.

[0023] Figure 2 yes Figure 1 The three-dimensional schematic diagram of the bone conduction vibrator shown in the figure, in which the shell component is separated.

[0024] Figure 3 yes Figure 1 The cross-sectional view of the bone conduction vibrator is shown.

[0025] Figure 4 yes Figure 3 The diagram shows a magnetic circuit diagram of the magnetic field generated at a certain moment after the coil of the bone conduction vibrator is energized.

[0026] Figure 5 yes Figure 3 The figure shows a partial cross-sectional view of a bone conduction vibrator.

[0027] Figure 6 yes Figure 1 The exploded view of the bone conduction vibrator is shown.

[0028] Figure 7 yes Figure 1 Schematic diagram of the permanent magnet circuit in the bone conduction vibrator shown.

[0029] Figure 8 Schematic diagram showing that each magnet assembly corresponds to a group of ferrite assemblies in some embodiments of the present invention.

[0030] Figure 9 Schematic diagram of the three-dimensional structure of the ferromagnetic element according to some embodiments of the present invention.

[0031] Figure 10 yes Figure 1 The diagram shows the position of the permanent magnetic circuit system and magnetic plate assembly of the bone conduction vibrator.

[0032] Figure 11 1 is a schematic cross-sectional view of a bone conduction vibrator according to some embodiments of the present invention. In the figure, a space is formed between two magnetic conductive plates.

[0033] Figure 12 1 is a schematic cross-sectional view of a bone conduction vibrator according to some embodiments of the present invention. In the figure, two magnetic conductive plates are connected by a connecting block.

[0034] Figure 13 1 is a schematic cross-sectional view of a bone conduction vibrator according to some embodiments of the present invention. In the figure, two magnetic conductive plates are connected via a gasket.

[0035] Figure 14 It is a three-dimensional schematic diagram of the magnetic conductive plate assembly of some embodiments of the present invention.

[0036] Figure 15 yes Figure 1 The bone conduction vibrator shown is a schematic cross-sectional view without the housing assembly.

[0037] Figure 16 Schematic diagram of a three-dimensional spring in some embodiments of the present invention.

[0038] Figure 17 1 is a perspective schematic diagram of a bone conduction vibrator in some embodiments of the present invention without showing the outer shell component. In the figure, the reset component includes two springs.

[0039] Figure 18 yes Figure 17 The cross-sectional view of the bone conduction vibrator is shown.

[0040] Figure 19 Schematic cross-sectional views of bone conduction vibrators according to some embodiments of the present invention.

[0041] Figure 20 1 is a perspective schematic diagram of a bone conduction vibrator without showing the outer shell component in some embodiments of the present invention. In the figure, each suspended portion of the spring has a hole.

[0042] Figure 21 3D is a schematic three-dimensional diagram of a reset assembly in some embodiments of the present invention. In the figure, each suspended portion of the spring has two holes.

[0043] Figure 22 3D is a schematic three-dimensional diagram of a reset assembly in some embodiments of the present invention. In the figure, each suspended portion of the spring has four holes.

[0044] Figure 23 2 is a top view of a reset assembly according to some embodiments of the present invention. In the figure, each suspended portion of the spring has two grooves.

[0045] Figure 24 It is a three-dimensional schematic diagram of the bone conduction vibrator in some embodiments of the present invention.

[0046] Figure 25 yes Figure 24 The exploded view of the bone conduction vibrator is shown.

[0047] Figure 26 yes Figure 24 The three-dimensional schematic diagram of the bone conduction vibrator shown in the figure, in which the shell component is separated.

[0048] Figure 27 yes Figure 24 Schematic diagram of the connection between the outer bracket of the bone conduction vibrator and the magnetic plate.

[0049] Figure 28 yes Figure 24 The diagram shows a schematic diagram of two outer supports of a bone conduction vibrator connected to form a ring.

[0050] Figure 29 1 is a three-dimensional schematic diagram of a bone conduction vibrator according to some embodiments of the present invention, in which the housing component is separated.

[0051] Figure 30 yes Figure 29 The cross-sectional view of the bone conduction vibrator is shown.

[0052] Figure 31 yes Figure 30 Schematic diagram of the bone conduction vibrator when the coil is connected to the connecting plate.

[0053] Figure 32 1 is a perspective schematic diagram of a bone conduction vibrator in some embodiments of the present invention without showing the outer shell component. In the figure, the reset component includes two springs.

[0054] Figure 33 1 is a three-dimensional schematic diagram of a bone conduction vibrator according to some embodiments of the present invention, in which the housing component is separated.

[0055] Figure 34 yes Figure 33 The cross-sectional view of the bone conduction vibrator is shown.

[0056] Figure 35 1 is a three-dimensional schematic diagram of a bone conduction vibrator according to some embodiments of the present invention, in which the housing component is separated.

[0057] Figure 36 yes Figure 35 The cross-sectional view of one half of the bone conduction vibrator is shown, and the other half is symmetrical to it.

[0058] Figure 37 Schematic cross-sectional views of bone conduction vibrators according to some embodiments of the present invention.

[0059] Figure 38 1 is a perspective schematic diagram of a bone conduction vibrator without showing the outer shell component in some embodiments of the present invention. In the figure, each suspended portion of the spring has a hole.

[0060] Figure 39 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has a hole.

[0061] Figure 40 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has a hole.

[0062] Figure 41 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has two holes.

[0063] Figure 423D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has three holes.

[0064] Figure 43 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has six holes.

[0065] Figure 44 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has six holes.

[0066] Figure 45 1 is a three-dimensional schematic diagram of a bone conduction vibrator according to some embodiments of the present invention, in which the housing component and the spacer are separated.

[0067] Figure 46 yes Figure 45 The cross-sectional view of the bone conduction vibrator is shown.

[0068] Figure 47 Schematic cross-sectional views of bone conduction vibrators according to some embodiments of the present invention.

[0069] Figure 48 Schematic cross-sectional views of bone conduction vibrators according to some embodiments of the present invention.

[0070] Figure 49 Schematic cross-sectional views of bone conduction vibrators according to some embodiments of the present invention. DETAILED DESCRIPTION

[0071] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0072] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0073] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0074] Some embodiments of the present invention provide a bone conduction vibrator, such as Figures 1 to 3 As shown, it includes main components such as a shell assembly 1, a permanent magnetic circuit system 2, a coil 3, a magnetic conductive plate assembly 4 and a reset assembly 5, among which the permanent magnetic circuit system 2, the coil 3, the magnetic conductive plate assembly 4 and the reset assembly 5 are all located in the shell assembly 1.

[0075] like Figure 3 As shown, the permanent magnet circuit system 2 includes two sets of magnet assemblies 21, each set of magnet assemblies 21 includes two magnets 210 with opposite poles. The opposite pole arrangement means that the magnetic poles of the two magnets 210 are opposite to each other. For example, Figure 3 In the illustrated embodiment, the upper and lower magnets 210 have opposing poles, ie, an S pole and a N pole, respectively. It is understood that the polarity can also be reversed. Optionally, the two sets of magnet assemblies 21 are spaced apart along the length of the magnetic plate assembly 4 to reduce magnetic interference between adjacent magnets in the longitudinal direction.

[0076] In some embodiments, the number of coils 3 is two. Figure 3 As shown, the two coils 3 are respectively located on both sides of the permanent magnetic circuit system 2. Specifically, the two coils 3 and the permanent magnetic circuit system 2 are spaced apart along the length direction of the magnetic plate assembly 4, wherein the permanent magnetic circuit system 2 is located between the two coils 3.

[0077] The magnetic plate assembly 4 includes two magnetic plates 40 that are respectively inserted into the two coils 3. The magnetic plates 40 extend between the two magnets 210 of the magnet assembly 21 adjacent to the coils they are inserted into, and the adjacent ends of the two magnetic plates 40 are not directly magnetically connected, that is, the two are not in direct contact or are not directly connected by magnetic conductive material, so that the magnetic field loops generated by the two coils 3 are independent to avoid mutual interference or magnetic short circuit. When the coils 3 are energized, the two coils 3 simultaneously polarize the parts of the two magnetic plates 40 located between the two coils 3 to the same polarity. Specifically, the ends (inner ends) of the magnetic plates 40 located in the magnet assembly 21 are polarized to the N pole or the S pole, thereby generating an attractive force or a repulsive force between the magnets 210. For example, Figure 4In the example shown, the end of the left magnetic plate 40 located in the magnet assembly 21 is polarized to the N pole. At this time, it is attracted by the upper magnet 210 and repelled by the lower magnet 210, that is, the magnetic plate 40 is subjected to an upward magnetic force, and the permanent magnet magnetic circuit system 2 is subjected to a downward magnetic force. Since the magnetic plate 40 is relatively fixed to the shell assembly 1, the permanent magnet magnetic circuit system 2 will move downward relative to the magnetic plate 40. When the polarity of the inner end of the magnetic plate 40 changes to the S pole, the permanent magnet magnetic circuit system 2 will move upward relative to the magnetic plate 40.

[0078] It can be understood that when alternating current is supplied to the two coils 3 synchronously, so that the direction of the magnetic force between the two magnetic plates 40 and the corresponding magnet assemblies 21 is always the same at the same time, the permanent magnet magnetic circuit system 2 will move in the same direction relative to the magnetic plate assembly 4 as a whole, thereby generating reciprocating vibration and realizing bone conduction sound transmission.

[0079] The reset assembly 5 is connected between the magnetic plate assembly 4 and the permanent magnetic circuit system 2. It allows relative displacement between the magnetic plate assembly 4 and the permanent magnetic circuit system 2, and when the magnetic plate assembly 4 or the permanent magnetic circuit system 2 deviates from the initial position, it can provide a reset force to drive the magnetic plate assembly 4 or the permanent magnetic circuit system 2 to return to the initial position. The initial position refers to the position of the magnetic plate assembly 4 and the permanent magnetic circuit system 2 when the bone conduction vibrator is not powered. Typically, in the initial position, the magnetic plate assembly 4 is centered between the two magnets of the magnet assembly 21 in the vibration direction. In some embodiments, the reset assembly 5 includes a spring 50 for providing elastic force, and the elastic force of the spring 50 is used to reset the magnetic plate assembly 4 or the permanent magnetic circuit system 2.

[0080] As can be understood, the presence of two sets of magnet assemblies 21 and two coils 3 allows the bone conduction transducer to generate greater driving force, increasing both its sensitivity and sound loudness, thereby enhancing the listening experience. Furthermore, by providing a restoring force through the spring 50, the overall stiffness coefficient (K value) can be reduced, which helps lower the low-frequency resonant frequency (low-frequency F0) of the vibration system, resulting in higher low-frequency sensitivity and better bass.

[0081] It can be understood that by fixing the magnetic plate assembly 4 or fixing the permanent magnetic circuit system 2, the vibration part of the bone conduction vibrator during operation can be changed.

[0082] In some embodiments, Figure 3 and Figure 19Taking the structure shown as an example, the magnetic plate assembly 4 and the housing assembly 1 are relatively fixed. At this time, when the bone conduction vibrator is working, the permanent magnetic circuit system 2 will vibrate relative to the housing assembly 1. Since the mass of the permanent magnetic circuit system 2 is relatively large, it can provide a greater vibration sense and is conducive to further reducing the low-frequency F0 and improving the low-frequency acoustic performance. It can be understood that when the coil 3 is relatively fixed to the permanent magnetic circuit system 2 (for example, Figure 3 In the embodiment shown), when the two move synchronously, the mass of the vibration part of the bone conduction vibrator will be further increased, thereby further improving the low-frequency sound effect. When the coil 3 and the reset component 5 are relatively fixed (for example Figure 19 In the embodiment shown), since the mass of the vibration part is relatively reduced, it is beneficial to improve the vibration response speed and enhance the overall sensitivity, thereby achieving a better balance between improving the low-frequency effect and the response speed.

[0083] In some embodiments, Figures 46 to 49 Taking the structure shown as an example, the permanent magnetic circuit system 2 is relatively fixed to the housing assembly 1. At this time, when the bone conduction vibrator is working, the magnetic plate assembly 4 will vibrate relative to the housing assembly 1. Since the mass of the magnetic plate assembly 4 is usually smaller than that of the permanent magnetic circuit system 2, the magnetic plate assembly 4 usually responds faster to the electrical signal of the coil 3, which is conducive to improving the overall sensitivity. It can be understood that by fixing the coil 3 and the reset assembly 5 relative to each other (for example, Figure 48 and Figure 49 In the embodiment shown in the figure), when the two move synchronously, the mass of the vibration part of the bone conduction vibrator can be increased, thereby achieving a better balance between improving the low-frequency effect and the response speed.

[0084] In this article, the vibration direction of the bone conduction vibrator, that is, the vibration direction of the permanent magnet magnetic circuit system 2 or the magnetic plate assembly 4 during operation, is consistent with the thickness direction of the magnetic plate 40 and the magnetic plate assembly 4. It can reduce the thickness of the bone conduction vibrator and increase the relative area between the magnetic plate 40 and the magnet 210, thereby improving the driving force.

[0085] In the embodiment of this specification, the length directions of the magnetic conductive plate 40, the magnetic conductive plate assembly 4 and the bone conduction vibrator are also consistent.

[0086] It is understood that in order to ensure that the vibrating part of the bone conduction vibrator can vibrate reliably, there is a vibration space between the vibrating part and the stationary fixed part in the vibration direction, so as to prevent the fixed part from hindering the movement of the vibrating part. Figure 5 As shown, Figure 5 Shown Figure 3In the illustrated portion of the structure, in the vibration direction, a first spacing D1 is defined between the inner wall of the coil 3 and the magnetic plate 40, a second spacing D2 is defined between the magnet 210 and the magnetic plate 40, a third spacing D3 is defined between the spring 50 and the housing assembly 1, and a fourth spacing D4 is defined between the spring 50 and the coil 3, thereby providing vibration space. Optionally, the first spacing D1, the third spacing D3, and the fourth spacing D4 are all greater than the second spacing D2, resulting in a relatively closer distance between the magnetic plate 40 and the magnet 210. This facilitates increased driving force, accelerated vibration response, and prevents noise from colliding with other components during vibration.

[0087] Next, the relevant contents of the housing component 1 are described with examples.

[0088] In some embodiments, the housing assembly 1 is formed by connecting multiple housings. In this article, the meaning of multiple is two or more. Figure 1 and Figure 2 As shown, the housing assembly 1 includes a first housing 10 and a second housing 11. The first housing 10 and the second housing 11 each include a substrate 100 and a frame 101 protruding from the outer edge of the substrate 100. The first housing 10 and the second housing 11 are connected by the frame 101. The frame 101 is annular.

[0089] In the illustrated embodiment, the housing assembly 1 is in the shape of a rectangular parallelepiped as a whole.

[0090] In some embodiments, the shell assembly 1 is made of magnetic conductive material, and the magnetic field generated by the coil 3 being energized forms a magnetic circuit through the shell assembly 1 to increase the utilization of the magnetic field, which can more efficiently polarize the magnetic conductive plate 40 and improve the driving force.

[0091] like Figure 4 As shown, Figure 4 In the illustrated embodiment, both ends of the magnetic conductive plate assembly 4 are connected to the outer shell assembly 1. After the coil 3 is energized, the magnetic flux lines are emitted from the end of the magnetic conductive plate 40 located inside the magnet assembly 21, pass through the magnet 210, the ferrite assembly 22, the substrate 100 and the frame 101 of the outer shell assembly 1, and then return to the outer end of the magnetic conductive plate 40 (that is, the end of the magnetic conductive plate 40 close to the frame 101), forming a magnetic circuit. Figure 4 It is understood that when the inner end of the magnetic plate 40 is polarized to the S pole, the direction of the magnetic flux lines is opposite.

[0092] like Figure 36 As shown, Figure 36 In the illustrated embodiment, the two ends of the magnetic conductive plate assembly 4 are spaced apart from the outer shell assembly 1. After the coil 3 is energized, the magnetic flux lines are emitted from the end of the magnetic conductive plate 40 located inside the magnet assembly 21, pass through the magnet 210, the iron ferrite 220, the substrate 100 and the frame 101 of the outer shell assembly 1, and then return to the outer end of the magnetic conductive plate 40, forming a magnetic circuit. Figure 36 It is understood that when the inner end of the magnetic plate 40 is polarized to the S pole, the direction of the magnetic flux lines is opposite.

[0093] Optionally, along the thickness direction of the magnetic plate assembly 4, the distance L1 between the ferrite assembly 22 and the inner wall of the housing assembly 1 (specifically, the inner wall of the substrate 100) is no more than 1 mm, and along the length direction of the magnetic plate assembly 4, the distance L2 between the magnetic plate 40 and the inner wall of the housing assembly 1 (specifically, the inner wall of the frame 101) is no more than 1 mm, so that the magnetic material can efficiently guide the magnetic flux lines to form a loop. Furthermore, optionally, the distance L1 is no more than 0.6 mm, and the distance L2 is no more than 0.6 mm, to further improve the efficiency of forming the magnetic loop.

[0094] Next, the relevant contents of the permanent magnet magnetic circuit system 2 are described with examples.

[0095] like Figure 3 As shown, the two magnets 210 of the magnet assembly 21 are respectively located on both sides of the thickness direction of the magnetic conductive plate 40, so that the magnets 210 and the surface of the thickness direction of the magnetic conductive plate 40 (i.e., the upper surface or the lower surface) are arranged relative to each other. Since the area of ​​the surface in the thickness direction is relatively larger, the distance between the two relative magnets 210 is relatively smaller, which is conducive to increasing the driving force.

[0096] In some embodiments, the magnetization directions of the two sets of magnet assemblies 21 are the same, that is, the arrangement direction of the magnetic poles of the magnets 210 is the same, both are arranged along the thickness direction of the magnetic conductive plate 40, and the arrangement order of the two magnetic poles is also the same, for example Figure 4 In the illustrated embodiment, both poles of the magnet 210 are arranged along the thickness direction, with the N pole at the top and the S pole at the bottom. The directions of the magnetic fields generated by the two coils 3 at the same time are opposite, so that the polarities of the ends of the two magnetic conductive plates 40 in the magnet assembly 21 at the same time are the same. Since the magnetization directions of all magnets 210 are the same, magnetization is more convenient. It is understandable that in other embodiments, the magnetization directions of the two groups of magnet assemblies 21 can also be opposite. In this case, the directions of the magnetic fields generated by the two coils 3 at the same time are the same, so that the polarities of the ends of the two magnetic conductive plates 40 in the magnet assembly 21 at the same time are opposite. In some embodiments, the two coils 3 are connected in series to ensure the synchronization of the generated magnetic fields.

[0097] like Figure 3 、 Figure 6 and Figure 7 As shown, the permanent magnet magnetic circuit system 2 includes an iron component 22 , which is provided with a channel 221 running through the length direction of the magnetic conductive plate 40 , and the two magnets 210 of the magnet component 21 are both connected to the inner surface 22 a of the iron component 22 .

[0098] In some embodiments, as Figure 3 As shown, the two sets of magnet assemblies 21 share a set of ferrite assembly 22, and the two sets of magnet assemblies 21 are arranged in the channel 221 of the same ferrite assembly 22. This is conducive to improving the compactness of the structure, allowing the permanent magnet circuit system 2 to be assembled into a whole, making it easier to install, and at the same time increasing the mass of the permanent magnet circuit system 2.

[0099] In some embodiments, as Figure 8 As shown, each set of magnet assemblies 21 has a corresponding set of ferrite assemblies 22. The two sets of magnet assemblies 21 are respectively disposed within the channels 221 of the two sets of ferrite assemblies 22. The two sets of ferrite assemblies 22 are spaced apart along the length of the magnetic conductive plate assembly 4. Optionally, both sets of ferrite assemblies 22 are connected to the same spring clip 50, so that they are assembled into a whole by the spring clip 50 and then installed, thereby ensuring the relative position of the two sets of ferrite assemblies 22.

[0100] In some embodiments, the ferrite assembly 22 is formed by connecting a plurality of ferrites 220 . Figure 9 In the illustrated embodiment, the ferrite assembly 22 includes two ferrites 220. Each ferrite 220 includes a base plate 2200 and side plates 2201 protruding from either side of the base plate 2200. The two ferrites 220 are connected via the side plates 2201. The two magnets 210 of the magnet assembly 21 are respectively connected to the base plates 2200 of the two ferrites 220. The magnet assembly 21 can form a magnetic circuit through the ferrite assembly 22, thereby improving the utilization of the magnetic field and increasing the driving force. Figure 7 In the figure, the dotted line with an arrow indicates the magnetic circuit of the magnet assembly 21. The magnetic flux lines emitted by the N pole of the upper magnet 210 pass through the upper base plate 2200, the upper side plate 2201, the lower side plate 2201 and the lower base plate 2200 in sequence and then enter the S pole of the lower magnet 210. The magnetic flux lines emitted by the N pole of the lower magnet 210 enter the S pole of the upper magnet 210 from the air gap, thereby forming a closed loop.

[0101] In some embodiments, as Figure 10 As shown, the outer side surface 220a of the ferrite assembly 22 is flush with the outer side surface 210b of the adjacent magnet 210. The outer side surface refers to the side of the ferrite assembly 22 and magnet 210 near the end of the bone conduction vibrator. This allows full utilization of the ferrite assembly 22 and magnet 210, improving the compactness of the structure and reducing the length of the bone conduction vibrator.

[0102] Next, the relevant contents of the magnetic conductive plate assembly 4 are described with examples.

[0103] The magnetic conductive plate assembly 4 is in a strip shape as a whole, with its length being greater than its width, and its width being greater than its thickness.

[0104] In some embodiments, as Figure 11 As shown, the two magnetic conductive plates 40 are spaced apart, and a space 42 is formed between them. Optionally, the two magnetic conductive plates 40 are spaced apart along the length direction of the magnetic conductive plate assembly 4. As a feasible example, the portion of the magnetic conductive plate 40 located in the magnet assembly 21 is suspended, and the magnetic conductive plate 40 is fixedly connected to the outer shell assembly 1 so that the magnetic conductive plate 40 can remain relatively fixed to the outer shell assembly 1 and is not easily tilted or displaced under the action of magnetic force. It is understandable that the rigidity of the magnetic conductive plate 40 can be increased so that it can maintain a horizontal state and reduce the vibration of its inner end. As another feasible example, the portion located in the magnet assembly 21 can be connected to the outer shell assembly 1 through a connector (not shown) to improve its stability.

[0105] In some embodiments, as Figure 12 As shown, the two magnetic conductive plates 40 are spaced apart and connected by a connecting block 43. This provides support for the inner ends of the magnetic conductive plates 40 within the magnet assembly 21, enhancing the overall structural strength of the magnetic conductive plate assembly 4 and ensuring the stability of the bone conduction vibrator. Furthermore, the magnetic conductive plate assembly 4 can be installed as a single unit, making installation more convenient. Optionally, the two magnetic conductive plates 40 can be spaced apart along the length of the magnetic conductive plate assembly 4.

[0106] Optionally, the surfaces of the two magnetic conductive plates 40 in the vibration direction are flush (i.e., the upper surfaces of the two magnetic conductive plates 40 are flush, and the lower surfaces of the two magnetic conductive plates 40 are flush) to fully utilize the space and ensure the consistency of the width of the magnetic gap between the magnetic conductive plates 40 and the magnet 210.

[0107] Optionally, the surfaces of the magnetic conductive plate 40 and the connecting block 43 in the vibration direction are flush (i.e., the upper surface of the magnetic conductive plate 40 is flush with the upper surface of the connecting block 43, and the lower surface of the magnetic conductive plate 40 is flush with the lower surface of the connecting block 43). This provides a larger contact area between the magnetic conductive plate 40 and the connecting block 43, improving the connection strength. Furthermore, the connecting block 43 does not protrude from the outer surface of the magnetic conductive plate 40, which helps prevent the connecting block 43 from striking the magnet 210 during vibration, generating noise or causing damage. Furthermore, optionally, the magnetic conductive plate 40 and the connecting block 43 have the same wall thickness, and the wall thickness of both is the same everywhere.

[0108] The connecting block 43 is made of non-magnetic material, such as stainless steel, copper, aluminum or ceramic, and can be connected to the magnetic conductive plate 40 by gluing or welding.

[0109] In some embodiments, as Figure 13As shown, the two magnetic conductive plates 40 are spaced apart and connected by a gasket 44. The gasket 44 is made of a non-magnetic material and is attached to the surface of the magnetic conductive plates 40 facing the magnet 210 (i.e., the surface in the thickness direction) to increase the structural strength of the magnetic conductive plate assembly 4 and the stability of the bone conduction vibrator. Optionally, gaskets 44 are provided on both surfaces of the magnetic conductive plates 40 in the thickness direction to increase the strength of the connection. Optionally, the two magnetic conductive plates 40 are spaced apart along the length of the magnetic conductive plate assembly 4. In some embodiments, the gasket 44 extends between the magnetic plate 40 and the magnet 210 so that the gasket 44 can protect the magnet 210 and the magnetic plate 40, and is helpful in preventing the magnetic plate 40 and the magnet 210 from being sucked together due to contact. Optionally, the gasket 44 is made of a hard material whose hardness is less than that of the magnetic plate 40. For example, it can be made of stainless steel, copper, aluminum or plastic. When the magnet 210 undergoes a large displacement and moves toward the magnetic plate 40, the magnet 210 will contact the gasket 44 instead of the magnetic plate 40, thereby playing a protective role.

[0110] In some embodiments, a connecting block 43 and a gasket 44 are provided between the two magnetic conductive plates 40. The gasket 44 is at least partially located between the magnetic conductive plates 40 and the magnet 210. The gasket 44 is made of non-magnetic material to prevent the magnetic conductive plates 40 and the magnet 210 from being stuck together due to contact. The hardness of the gasket is less than that of the magnetic conductive plates 40 to improve the anti-collision effect. Figure 5 and Figure 14 As shown, a gasket 44 connects the connecting block 43 and the two magnetic conductive plates 40, further improving the connection strength and providing protection. When the connecting block 43 is provided, the gasket 44 can be made of a flexible material with a lower hardness than the magnetic conductive plates 40 to provide better collision protection. The flexible material can be, for example, rubber.

[0111] Optional, reference Figure 5 The length L3 of the portion of the gasket 44 between the magnet 210 and the magnetic conductive plate 40 is not less than one-third of the length L4 of the magnet 210, so that it can reliably play an anti-collision effect and obtain better connection strength.

[0112] Optionally, in the above embodiment, the spacing L5 between the two magnetic conductive plates 40 is no less than 0.2 mm to reduce mutual interference between the magnetic fields of the two magnetic conductive plates 40 after polarization. Furthermore, the spacing L5 is no more than 1 mm to ensure that the overall length of the bone conduction vibrator is not excessive. Optionally, the distance between two adjacent magnets 210 in the longitudinal direction is no less than 0.2 mm to reduce magnetic field interference between the two magnets 210. Furthermore, the distance L5 is no more than 1 mm to reduce the size of the product. Furthermore, the distance between two adjacent magnets 210 in the longitudinal direction is the same as the spacing L5 between the two magnetic conductive plates 40.

[0113] In some embodiments, the magnetic conductive plate assembly 4 is fixed relative to the housing assembly 1 .

[0114] As a feasible example, both ends of the magnetic plate assembly 4 are fixedly connected to the housing assembly 1, for example, Figures 1 to 3 As shown, both ends of the magnetic conductive plate assembly 4 (i.e., the ends of the magnetic conductive plate 40 close to the outer shell assembly 1) are clamped between the first shell 10 and the second shell 11. The first shell 10 and the second shell 11 are both provided with mounting grooves 102 adapted to the ends of the magnetic conductive plate 40. The mounting grooves 102 on the two shells cooperate to accommodate the magnetic conductive plate 40. In other embodiments, only one shell may be provided with a mounting groove 102 adapted to the magnetic conductive plate 40.

[0115] As another possible example, Figures 24 to 28 As shown, the magnetic conductive plate assembly 4 includes two outer frames 41 respectively connected to the two magnetic conductive plates 40. The outer frames 41 are roughly U-shaped, and their shape after being connected to the magnetic conductive plates 40 is roughly E-shaped. Specifically, the outer frame 41 includes a middle portion 410 and side arms 411 connected to both ends of the middle portion 410. The two side arms 411 extend in the same direction. The magnetic conductive plates 40 are connected to the middle portion 410 and are located between the two side arms 411. The outer frame 41 is clamped between the first shell 10 and the second shell 11 so that the magnetic conductive plate assembly 4 is fixedly connected to the outer shell assembly 1. Optionally, the outer frame 41 and the magnetic conductive plates 40 are integrally formed. In some instances, the two outer frames 41 are spaced apart and do not contact each other. In other instances, such as Figure 28 As shown, the side arms 411 of the two outer frames 41 are connected to each other to form a ring. Optionally, the outer surface of the outer frame 41 is flush with the outer surface of the housing assembly 1 to facilitate positioning and assembly.

[0116] As another possible example, Figure 33 and Figure 34 As shown, both ends of the magnetic conductive plate assembly 4 are connected to the housing assembly 1 via connecting plates 53 to achieve relative fixation of the magnetic conductive plate assembly 4 and the housing assembly 1 .

[0117] As another possible example, Figures 35 to 37 As shown, both ends of the magnetic conductive plate assembly 4 are connected to the outer shell assembly 1 through support pads 6 to achieve relative fixation of the magnetic conductive plate assembly 4 and the outer shell assembly 1.

[0118] In some embodiments, as Figure 10As shown, the inner side surface 40b of the magnetic conductive plate 40 is flush with the inner side surface 210a of the adjacent magnet 210 to fully utilize the magnet 210 and reduce the mutual interference of the magnetic fields between the two magnetic conductive plates 40 after they are polarized. For example, if the magnetic conductive plate 40 is retracted into the inner side surface 210a of the magnet 210, the utilization rate of the magnetic field of the magnet 210 will be reduced. If the magnetic conductive plate 40 protrudes beyond the inner side surface 210a of the magnet 210, the two magnetic conductive plates 40 are likely to be too close to each other, and a large repulsive force is likely to be generated between them, which is not conducive to structural stability. If the spacing between the two magnetic conductive plates 40 is maintained, the volume of the housing assembly 1 will be increased, or the volume of the magnet 210 will be reduced, thereby reducing the driving force. The inner side surface refers to the side of the magnetic conductive plate 40 and the magnet 210 that is relatively far away from the end of the housing assembly 1.

[0119] Next, the relevant contents of the reset component 5 are described with examples.

[0120] The reset assembly 5 is located on one side of the vibration direction of the magnetic plate assembly 4 to provide elastic force along the vibration direction. There are many ways to connect the reset assembly 5 to the permanent magnetic circuit system 2 and the magnetic plate assembly 4, which are described below with examples.

[0121] In some embodiments, the reset assembly 5 is connected to the permanent magnetic circuit system 2 and the magnetic plate assembly 4, such as Figure 15 and Figure 16 As shown, the reset assembly 5 includes two fixed plates 51 at its two ends and a connecting plate 52 connected between the spring plate 50 and the fixed plate 51. The spring plate 50 is connected to the outer surface 2a of the permanent magnetic circuit system 2 facing away from the magnetic plate 40 in the vibration direction (in the figure, this outer surface is the outer surface of the iron component 22). The two fixed plates 51 are respectively located on both sides of the two coils 3 along the length direction of the magnetic plate assembly 4 and are connected to the magnetic plate 40. The spring plate 50 has a first fixed portion 500 located in the middle thereof and connected to the permanent magnetic circuit system 2, and a suspended portion 501 located between the first fixed portion 500 and the connecting plate 52. The reset assembly 5 mainly provides the reset force through the elastic deformation of the suspended portion 501. There is a vibration space between the suspended portion 501 of the spring plate 50 and the coil 3.

[0122] Optionally, the spring piece 50, the connecting piece 52 and the fixing piece 51 are integrally formed, for example, by integrally bending a metal sheet, so as to reduce the number of overall parts, facilitate assembly, and improve assembly accuracy.

[0123] Optionally, the fixing plate 51 is connected to the surface 40a of the magnetic conductive plate 40 facing the spring 50, and the connecting plate 52 is arranged parallel to the vibration direction and perpendicular to the spring 50 and the fixing plate 51. This can improve the supporting performance of the connecting plate 52 and provide more sufficient space for accommodating the coil 3. When the coil 3 is connected to the connecting plate 52, it can also facilitate the installation of the coil 3 and improve the connection strength.

[0124] In other embodiments, the reset assembly 5 is connected to the permanent magnetic circuit system 2 and the magnetic plate assembly 4, such as Figures 29 to 32 As shown, the spring piece 50 is connected to the outer surface 2a of the permanent magnetic circuit system 2 facing away from the magnetic plate 40 in the vibration direction (in the figure, the outer surface is the outer surface of the iron component 22), and its two ends extend along the length direction of the magnetic plate component 4 to exceed the permanent magnetic circuit system 2, and extend respectively toward the side where the two coils 3 are located. The reset component 5 and its spring clip 50 extend beyond the two ends of the two coils 3 in the length direction of the magnetic plate assembly 4. The reset component 5 includes two connecting plates 53 located at the two ends of the two coils 3 along the length direction of the magnetic plate assembly 4. The connecting plate 53 is connected between the spring clip 50 and the magnetic plate 40. The part of the spring clip 50 connected to the permanent magnet magnetic circuit system 2 is its first fixed part 500, and the part connected to the connecting plate 53 is its second fixed part 502. The part located between the first fixed part 500 and the second fixed part 502 is its suspended part 501. The reset component 5 mainly provides the reset force through the elastic deformation of the suspended part 501. The suspended part 501 of the spring clip 50 is arranged opposite to the coil 3, and there is a vibration space between the two.

[0125] The connecting plate 53 can be made of magnetic conductive material or non-magnetic conductive material.

[0126] Optional, such as Figure 30 and Figure 31 As shown, the connecting plate 53 is connected to the surface 40a of the magnetic plate 40 facing the spring 50, and the spring 50 is connected to the surface of the connecting plate 53 facing away from the magnetic plate 40 for easy fixation. The connecting plate 53 is arranged parallel to the vibration direction and perpendicular to the spring 50.

[0127] Optionally, the spring piece 50 is in the shape of a flat sheet, and its thickness direction is consistent with the vibration direction of the bone conduction vibrator, so that it can be elastically deformed along the vibration direction, and the deformation amplitude of the upper and lower sides is more consistent, while saving space in the thickness direction of the bone conduction vibrator.

[0128] In some embodiments, as Figure 3 and Figure 30 As shown, the bone conduction vibrator includes two sets of reset components 5, and the two sets of reset components 5 are symmetrically arranged on both sides of the thickness direction of the magnetic conductive plate component 4, so that when the bone conduction vibrator is working, the vibration part vibrates more smoothly and has better linearity.

[0129] In some embodiments, the bone conduction vibrator includes two sets of reset components 5, and the springs 50 of the two sets of reset components 5 are symmetrically arranged, and the structures of the connecting plates 53 of the two sets of reset components 5 are different. Figure 33 and Figure 34As shown, two connecting plates 53 located on the same side (the lower side in the figure) of the magnetic conductive plate 40 in the thickness direction are connected to the housing assembly 1, thereby fixing the magnetic conductive plate 40 relative to the housing assembly 1. The connecting plate 53 connected to the housing assembly 1 is provided with outwardly protruding support feet 530, and the support feet 530 are connected to the housing assembly 1. Optionally, the support feet 530 are connected to the inner wall 100a of the base plate 100 of the housing assembly 1. A single connecting plate 53 is provided with two support feet 530. The magnetic conductive plate 40 is located between the two support feet 530 and is positioned by the two support feet 430. The support feet 530 extend along the thickness direction of the magnetic conductive plate 40 and contact the inner wall of the housing assembly 1.

[0130] It is understandable that the connection plates 53 of the two sets of reset assemblies 5 may also be configured to have a structure with support legs 530 . In this case, the two sets of reset assemblies 5 are symmetrical.

[0131] In some embodiments, the bone conduction vibrator includes two sets of reset components 5, and the two sets of reset components 5 are symmetrically arranged, for example Figure 3 、 Figure 35 and Figure 36 shown. Figure 35 and Figure 36 In the illustrated structure, the reset assembly 5 and the housing assembly 1 are connected via a support block 6. The connecting plate 53 is generally rectangular. The support block 6 is positioned corresponding to the connecting plate 53 and connected between the end (second fixing portion 502) of the spring 50 and the base plate 100 of the housing assembly 1, thereby securing the reset assembly 5 relative to the housing assembly 1. Optionally, the magnetic plate assembly 4 is provided with a support block 6 on one side in the vibration direction, and support blocks 6 are provided at both ends of the reset assembly 5 to improve support performance and facilitate assembly. Of course, support blocks 6 can also be provided at both ends of both sets of reset assemblies 5 to further improve support performance.

[0132] The support pad 6 can be made of magnetic conductive material or non-magnetic conductive material.

[0133] Optionally, when the magnetic conductive plate assembly 4 is connected to the outer shell assembly 1 through the connecting plate 53 or the support pad 6, the two ends of the magnetic conductive plate assembly 4 in the longitudinal direction are spaced apart from the outer shell assembly 1, and the two do not contact each other. In this way, there is no need to groove the outer shell assembly 1, which is conducive to simplifying the process and improving the sealing. Further optionally, the outer side surface of the magnetic conductive plate 40 is flush with the outer side surface of the connecting plate 53 for easy positioning. The outer side surface refers to the side surface of the magnetic conductive plate 40 and the connecting plate 53 close to the end of the length direction of the outer shell assembly 1. As mentioned above, in order to reliably form a magnetic circuit, optionally, the spacing L2 between the magnetic conductive plate assembly 4 and the outer shell assembly 1 along the longitudinal direction of the magnetic conductive plate assembly 4 does not exceed 1 mm. Of course, even if the magnetic conductive plate assembly 4 has been connected to the outer shell assembly 1 through the connecting plate 53, it can still be in contact with the outer shell assembly 1 or fixedly connected to the outer shell assembly 1 to further improve the connection strength and more reliably form a magnetic circuit.

[0134] It is understandable that the number of spring clips 50 included in the reset assembly 5 is not limited to one, and it can also include two or more spring clips 50, all of which are connected to the outer surface of the permanent magnet magnetic circuit system 2 facing away from the magnetic plate 40 in the vibration direction of the bone conduction vibrator, and at least two spring clips 50 extend toward the sides where the two coils 3 are located, so as to be connected to the two ends of the magnetic plate assembly 4 through the connecting piece 52 or the connecting plate 53 or other components. For example, Figure 17 、 Figure 18 and Figure 32 In the embodiment shown, the reset assembly 5 includes two spring clips 50, one end of which is connected to the permanent magnet magnetic circuit system 2, and the other end extends along the length direction of the magnetic plate assembly 4 toward the side where the coil 3 is located, so as to be connected to the connecting piece 52 or the connecting plate 53. The two spring clips 50 extend in opposite directions, and the two spring clips 50 extend toward the sides where the two coils 3 are located respectively. The reset assembly 5 extends in the length direction of the magnetic plate assembly 4 to exceed the two ends of the two coils 3 and is connected to the two ends of the magnetic plate assembly 4. It can be understood that Figure 3 For example, a single spring clip 50 extending beyond both ends of the permanent magnet circuit system 2 increases the contact area between the spring clip 50 and the permanent magnet circuit system 2, improving the connection effect. Furthermore, the positional accuracy of the spring clip 50 can be more accurately guaranteed, eliminating the need to adjust the relative positions of the two spring clips 50. This also helps reduce the number of parts and improves production efficiency.

[0135] It can be understood that the two ends of the magnetic plate assembly 4 extend beyond the two ends of the two coils 3, and the two ends of the reset assembly 5 are respectively connected to the two ends of the magnetic plate assembly 4 located outside the two coils 3, and the middle part is connected to the permanent magnet magnetic circuit system 2, which can make the force on the magnetic plate assembly 4 more symmetrical, more stable during vibration, and better linear.

[0136] Next, examples are given to illustrate the content related to shrapnel.

[0137] It is understood that because the spring clip 50 is thinner than the magnetic plate 40, its stiffness coefficient is smaller, allowing the bone conduction vibrator to achieve a lower low-frequency resonance frequency, thereby improving low-frequency performance. Furthermore, the spring clip 50 extends to connect with the connecting plate 53 or the connecting piece 52 outside the coil 3. This fully utilizes the space within the housing assembly 1 and increases the length of the suspended portion 501 of the spring clip 50, thereby reducing the stiffness coefficient of the spring clip 50 and improving low-frequency performance. Furthermore, the suspended portion 501 of the spring clip 50 does not need to be very thin in the width direction, making it less susceptible to damage, which helps improve the reliability of the spring clip.

[0138] It can be understood that when the spring piece 50 and the magnetic conductive plate assembly 4 are arranged in parallel, the width direction, length direction and thickness direction of the two are consistent.

[0139] In some embodiments, the effective width B2 of at least part of the suspended portion 501 is smaller than the width B1 of the spring 50. The effective width of the suspended portion 501 refers to the minimum width of the solid part of the suspended portion 501. Figure 20 Taking the embodiment shown as an example, the effective width is the sum of B20 and B21. Figure 23 Taking the illustrated embodiment as an example, the effective width B2 of the overhang portion 501 is the width at its narrowest point. A smaller effective width indicates less material in the width direction of the overhang portion 501. The width B1 of the spring clip 50 refers to the width at its widest point. By adjusting the effective width of the overhang portion 501, the stiffness coefficient of the spring clip 50 can be adjusted. Setting the effective width B2 of the overhang portion 501 to be smaller than the width B1 of the spring clip 50 effectively reduces the stiffness coefficient of the spring clip 50 and improves the low-frequency effect.

[0140] In some embodiments, the suspended portion 501 is provided with a hollow structure, and the effective width is reduced by the hollow structure. As some feasible examples, the hollow structure includes a hole 503 that is not connected to the side wall of the elastic sheet 50 in the width direction. Figures 20 to 22 and Figures 38 to 44 Schematic diagrams are shown when the hollow structure includes a hole 503. In these embodiments, the effective width of the suspended portion 501 is smaller than its own width B4. As other feasible examples, Figure 23 As shown, the hollow structure includes a slot 504 communicating with the sidewall 50a in the width direction of the elastic sheet 50. In other examples, the hollow structure may include both the hole 503 and the slot 504.

[0141] Optionally, the width of the suspended portion 501 is the same as the width of the portion where the spring clip 50 contacts the permanent magnet circuit system 2, so as to improve its anti-torsion capability, thereby improving the stability and linearity of the vibration. Optionally, the ratio of the width of the spring clip 50 to the width of the permanent magnet circuit system 2 is not less than 0.3, so as to ensure the contact area with the permanent magnet circuit system 2, improve the contact effect, and further ensure the anti-torsion capability of the spring clip 50. The width of the permanent magnet circuit system 2, i.e., the width of the ferrite component 22, refers to the width at its widest point. In this article, unless otherwise specified as "effective width", the "width" of an object refers to the width of its outer contour, without removing its hollowed-out portion. Further optionally, the spring clip 50 is of equal width.

[0142] It is understandable that the stiffness coefficient of the spring 50 can be adjusted by adjusting the number, area, shape and position of the holes 503 and the slots 504 .

[0143] In some embodiments, as Figure 20 、 Figure 38 、 Figure 39 and Figure 40 As shown, the hollow structure of each suspended portion 501 includes a hole 503. The shape of the hole 503 can be, for example, a rounded rectangle or an ellipse. The stiffness coefficient can be adjusted by adjusting the length, width, and shape of the hole 503. Optionally, the hole 503 extends along the length of the spring 50, and the length of the spring 50 is consistent with the length of the magnetic plate assembly 4.

[0144] In some embodiments, the hollow structure includes at least two holes 503, and the at least two holes 503 are spaced apart along the length direction or the width direction of the elastic sheet 50. Figure 21 and Figure 41 As shown, the hollow structure of each suspended portion 501 includes two holes. The two holes 503 are spaced apart along the length direction of the elastic piece 50. The shape of the hole can be a rounded rectangle, an ellipse, a trapezoid or a triangle. Figure 42 In the illustrated embodiment, the hollow structure includes three holes 503 spaced apart along the length direction of the elastic piece 50 . The holes are triangular in shape and arranged in a substantially rectangular shape. Figure 22 In the illustrated embodiment, the hollow structure includes four holes 503 , and the four holes 503 are arranged in two rows and two columns. Figure 43 and Figure 44 In the illustrated embodiment, the hollow structure includes six holes 503 arranged in two rows and three columns.

[0145] It can be understood that the number of holes mentioned above refers to the number of holes in the hollow structure on a single suspended portion 501 .

[0146] The spring piece 50 and the permanent magnetic circuit system 2 can be connected by gluing or welding. In some embodiments, the hollow structure at least partially extends to the outer surface of the permanent magnetic circuit system 2, so that the outer surface of the permanent magnetic circuit system 2 is exposed to form a glue-containing space to improve the connection strength of the adhesive connection.

[0147] In some embodiments, the spring clip 50 is made of a magnetically conductive material, which facilitates guiding the magnetic flux lines to form a loop and improves the magnetic conductivity. Optionally, the spring clip 50, the connecting piece 52, and the fixing piece 51 are all made of a magnetically conductive material, and the connecting plate 53 is also made of a magnetically conductive material. In other embodiments, the spring clip 50 is made of a non-magnetic material. Optionally, the spring clip 50 is a spring steel sheet, and further optionally, the spring clip 50 is a stainless steel spring steel sheet.

[0148] Next, the contents related to coil 3 are described with examples.

[0149] There are two coils 3 , which are respectively located at two ends of the permanent magnet magnetic circuit system 2 along the length direction of the magnetic conductive plate assembly 4 .

[0150] In some embodiments, the coil 3 is fixed relative to the permanent magnet circuit system 2, such as Figure 15 、 Figure 30 、 Figure 36 and Figure 46 As shown, the coil 3 is connected to the outer side surface 2b of the permanent magnetic circuit system 2, for example, by adhesive connection. Optionally, the outer side surface 210b of the magnet 210 is flush with the outer side surface 220a of the ferrite component 22, so that the contact area between the coil 3 and the outer side surface 2b of the permanent magnetic circuit system 2 is larger and the connection strength is better. When the outer side surface of the ferrite component 22 and the outer side surface of the magnet 210 are not flush, the relatively convex surface of the two is the outer side surface 2b of the permanent magnetic circuit system 2.

[0151] When the coil 3 is fixed relative to the permanent magnetic circuit system 2, it moves synchronously with the permanent magnetic circuit system 2. For example, in some embodiments, as shown in FIG. Figure 3 、 Figure 30 、 Figure 33 and Figure 36 As shown, the magnetic plate assembly 4 is relatively fixed to the housing assembly 1. During the operation of the bone conduction vibrator, the entire body composed of the coil 3 and the permanent magnetic circuit system 2 vibrates relative to the magnetic plate assembly 4. The mass of the vibrating part is relatively large, which is beneficial to reducing the low-frequency resonance frequency. In some embodiments, as Figures 45 to 47As shown, the permanent magnetic circuit system 2 is connected to the housing assembly 1 via a spacer 60. One side of the spacer 60 is connected to the housing assembly 1, and the other side is connected to the outer surface 2a of the permanent magnetic circuit system 2 and / or the reset assembly 5 (such as its spring 50). The connection method can be, for example, adhesive connection. The two ends of the magnetic plate assembly 4 are spaced apart from the housing assembly 1, and the two do not contact each other. During the operation of the bone conduction vibrator, the magnetic plate assembly 4 ( Figure 47 ) or the magnetic plate assembly 4 and the connecting plate 53 ( Figure 46 ) as a whole vibrates relative to the housing assembly 1, and its relatively low mass facilitates increased response speed. The spacer 60 can be connected to either the base plate 100 or the frame 101 of the housing assembly 1. When connected to the base plate 100, it facilitates the formation of a vibration space between the spring 50 and the base plate 100. The spacer 60 can be made of either a magnetically conductive material or a non-magnetic material. Using a magnetically conductive material facilitates a more efficient formation of a magnetic circuit.

[0152] In some embodiments, the coil 3 is relatively fixed to the magnetic plate assembly 4, and can be connected to the reset assembly 5 to achieve relative fixation with the magnetic plate assembly 4. Figure 19 In the illustrated embodiment, the coil 3 is connected to the connecting piece 52 of the spring 50 so that the coil 3 is relatively fixed with respect to the magnetic plate assembly 4. Optionally, the connecting piece 52 is arranged perpendicular to the magnetic plate 40 to improve the supporting performance and reduce or even prevent the deformation of the connecting piece 52 during vibration. The surface 52a of the coil 3 and the connecting piece 52 facing the permanent magnetic circuit system 2 can be glued, for example. Optionally, the hollow structure portion extends to the surface where the coil 3 contacts the connecting piece 52 (i.e., the outer surface of the coil 3) to form a glue-containing space to improve the strength of the glue connection. For example, in Figure 31 In the illustrated embodiment, the coil 3 is connected to the connecting plate 53 so that the coil 3 is relatively fixed relative to the magnetic conductive plate assembly 4. The coil 3 and the surface 53a of the connecting plate 53 facing the permanent magnetic circuit system 2 can be connected by, for example, adhesive bonding. Since the connecting plate 53 is thicker than the connecting piece 52, its rigidity is relatively better. Therefore, during vibration, the connecting plate 53 is not easily deformed and can reliably maintain its connection with the coil 3.

[0153] When the coil 3 is relatively fixed to the magnetic plate assembly 4, it moves synchronously with the magnetic plate assembly 4. For example, Figure 19 、 Figure 31 、 Figure 37 In the embodiment shown, the magnetic plate assembly 4 and the coil 3 are fixed relative to the housing assembly 1. When the bone conduction vibrator is working, the permanent magnetic circuit system 2 vibrates relative to the housing assembly 1, and the magnetic plate assembly 4 and the coil 3 remain relatively stationary with the housing assembly 1. Figure 48 and Figure 49In the embodiment shown, the permanent magnetic circuit system 2 is fixed relative to the housing assembly 1, and the magnetic plate assembly 4 and the coil 3 ( Figure 49 ) or the magnetic plate assembly 4, the coil 3 and the connecting plate 53 ( Figure 48 ) as a whole vibrates relative to the housing assembly 1.

[0154] It can be understood that when the coil 3 and the magnetic plate assembly 4 are relatively fixed, the distance between them and the magnetic plate 40 remains unchanged, and the polarization of the magnetic plate 40 is not easily affected by changes in the distance between the two, which is beneficial to improving the acoustic performance.

[0155] Optionally, when the coil 3 is connected to the permanent magnetic circuit system 2, there is a gap between it and the connecting piece 52 or the connecting plate 53. When the coil 3 is connected to the connecting piece 52 or the connecting plate 53, there is a gap between it and the permanent magnetic circuit system 2. The provision of the gap not only prevents the coil 3 from colliding with the permanent magnetic circuit system 2 or the connecting piece 52 or the connecting plate 53 during vibration, but also increases the length of the suspended portion 501 of the spring 50, thereby improving low-frequency acoustic performance.

[0156] Some embodiments of the present invention further provide an electronic device including the bone conduction transducer described above. The electronic device may be, for example, a wearable electronic device such as headphones, hearing aids, smart glasses, or a smart helmet. Of course, this is not limited to wearable electronic devices and may also include, for example, a mobile phone.

[0157] It should be noted that, in the absence of conflict, the various embodiments herein can be combined with each other to obtain more implementation plans.

[0158] The above is only a specific embodiment of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A bone conduction vibrator, characterized in that: include: A housing component (1), wherein the housing component (1) is made of a magnetic conductive material; A permanent magnetic circuit system (2) is provided in the housing assembly (1), the permanent magnetic circuit system (2) comprising an ferromagnetic component (22) and two groups of magnet assemblies (21), the magnet assemblies (21) forming a magnetic circuit through the ferromagnetic component (22), and each group of magnet assemblies (21) comprising two magnets (210) with opposite poles. Two coils (3) are provided in the housing component (1), and the two coils (3) are respectively located on both sides of the permanent magnet magnetic circuit system (2); A magnetic conductive plate assembly (4) comprising two magnetic conductive plates (40) respectively inserted into the two coils (3), wherein the magnetic conductive plates (40) extend between two magnets (210) of a magnet assembly (21) adjacent to the coils (3) inserted therethrough, adjacent ends of the two magnetic conductive plates (40) are not directly magnetically connected, and the two groups of magnet assemblies (21) are spaced apart along the length direction of the magnetic conductive plate assembly (4); and A reset assembly (5) is connected between the magnetic plate assembly (4) and the permanent magnetic circuit system (2), and includes a spring (50) for providing elastic force.

2. The bone conduction vibrator according to claim 1, wherein: The magnetic conductive plate assembly (4) is fixed relative to the housing assembly (1), the permanent magnetic circuit system (2) is capable of vibrating relative to the housing assembly (1), and the coil (3) is fixed relative to the permanent magnetic circuit system (2) or fixed relative to the magnetic conductive plate assembly (4).

3. The bone conduction vibrator according to claim 2, wherein: The magnetic conductive plate assembly (4) is strip-shaped as a whole, and both ends of the magnetic conductive plate assembly (4) are fixedly connected to the housing assembly (1).

4. The bone conduction vibrator according to claim 1, wherein: The permanent magnetic circuit system (2) is fixed relative to the housing assembly (1), the magnetic conductive plate assembly (4) is capable of vibrating relative to the housing assembly (1), and the coil (3) is fixed relative to the permanent magnetic circuit system (2) or fixed relative to the magnetic conductive plate assembly (4).

5. The bone conduction vibrator according to claim 4, wherein: It comprises a spacer (60) located between the permanent magnetic circuit system (2) and the housing assembly (1), the spacer (60) being connected to the permanent magnetic circuit system (2) and / or the spring piece (50), and forming a vibration space between the permanent magnetic circuit system (2) and the inner wall of the housing assembly (1) through the spacer (60) in the vibration direction of the bone conduction vibrator.

6. The bone conduction vibrator according to claim 1, wherein: The spring piece (50) is connected to the outer surface of the permanent magnetic circuit system (2) away from the magnetic plate (40) in the vibration direction of the bone conduction vibrator, and the two ends of the spring piece (50) respectively extend toward the sides where the two coils (3) are located, the reset component (5) exceeds the two ends of the two coils (3) in the length direction of the magnetic plate component (4), and the spring piece (50) has a suspended portion (501) arranged opposite to the coil (3); or, The reset assembly (5) includes at least two spring pieces (50) located on the same side of the magnetic plate assembly (4), and the spring pieces (50) are connected to the outer surface of the permanent magnet magnetic circuit system (2) away from the magnetic plate (40) in the vibration direction of the bone conduction vibrator, and at least two of the spring pieces (50) extend toward the sides where the two coils (3) are located. The reset assembly (5) extends in the length direction of the magnetic plate assembly (4) to exceed the two ends of the two coils (3), and the spring piece (50) has a suspended portion (501) arranged opposite to the coil (3).

7. The bone conduction vibrator according to claim 1, wherein: The two magnetic conductive plates (40) are spaced apart along the length direction of the magnetic conductive plate assembly (4), forming a spacing space (42) therebetween.

8. The bone conduction vibrator according to claim 1, wherein: The two magnetic conductive plates (40) are spaced apart along the length direction of the magnetic conductive plate assembly (4), and are connected via a connecting block (43), wherein the connecting block (43) is made of a non-magnetic conductive material.

9. The bone conduction vibrator according to claim 1, wherein: A gasket (44) made of a non-magnetic material is provided on the surface of the magnetic conductive plate (40) facing the magnet (210), the gasket (44) connecting the two magnetic conductive plates (40) and extending between the magnetic conductive plates (40) and the magnet (210), and the hardness of the gasket (44) is less than the hardness of the magnetic conductive plates (40).

10. The bone conduction vibrator according to claim 1, wherein: The inner side surface of the magnetic conductive plate (40) is flush with the inner side surface of the adjacent magnet (210).

11. The bone conduction vibrator according to claim 1, wherein: The two magnetic poles of the magnet (210) are arranged along the vibration direction of the bone conduction vibrator; The magnetization directions of the magnets (210) of the two groups of magnet assemblies (21) are the same, and the magnetic fields generated by the two coils (3) at the same time are in opposite directions; or, the magnetization directions of the magnets (210) of the two groups of magnet assemblies (21) are in opposite directions, and the magnetic fields generated by the two coils (3) at the same time are in the same direction.

12. The bone conduction vibrator according to claim 1, wherein: The two magnets (210) of the two groups of magnet assemblies (21) are both located on both sides of the thickness direction of the magnetic conductive plate assembly (4), and the thickness direction of the magnetic conductive plate assembly (4) is the same as the vibration direction of the bone conduction vibrator.

13. The bone conduction vibrator according to any one of claims 1 to 12, characterized in that: In the vibration direction of the bone conduction vibrator, there is a first distance D1 between the inner wall of the coil (3) and the magnetic conductive plate (40), a second distance D2 between the magnet (210) and the magnetic conductive plate (40), a third distance D3 between the spring (50) and the housing assembly (1), and a fourth distance D4 between the spring (50) and the coil (3), wherein the first distance D1, the third distance D3 and the fourth distance D4 are all greater than the second distance D2.

14. The bone conduction vibrator according to claim 1, wherein: The ferromagnetic component (22) is provided with a channel (221) penetrating along the length direction of the magnetic conductive plate component (4), and the two magnets (210) of the magnet component (21) are both connected to the inner surface of the magnetic conductive plate (40).

15. The bone conduction vibrator according to claim 14, wherein: The two groups of magnet assemblies (21) share one ferrite assembly (22), and the two groups of magnet assemblies (21) are arranged in a channel (221) of the same ferrite assembly (22).

16. The bone conduction vibrator according to claim 14, wherein: Each group of the magnet components (21) is correspondingly provided with a group of ferrite components (22); the two groups of the magnet components (21) are respectively arranged in the channels (221) of the two groups of ferrite components (22); and the two groups of ferrite components (22) are connected to the same spring piece (50).

17. The bone conduction vibrator according to claim 14, wherein: The ferrite assembly (22) comprises two ferrites (220), each of the two ferrites (220) comprising a bottom plate (2200) and side plates (2201) protruding from both sides of the bottom plate (2200), the two ferrites (220) being connected via the side plates (2201), and the two magnets (210) of the magnet assembly (21) being respectively connected to the bottom plates (2200) of the two ferrites (220).

18. The bone conduction vibrator according to claim 14, wherein: The outer side surface of the ferromagnetic element (22) is flush with the outer side surface of the magnet (210) adjacent thereto.

19. The bone conduction vibrator according to claim 14, wherein: In the vibration direction of the bone conduction vibrator, the distance L1 between the ferrite component (22) and the inner wall of the shell component (1) does not exceed 1 mm; in the length direction of the magnetic plate component (4), the distance L2 between the magnetic plate (40) and the inner wall of the shell component (1) does not exceed 1 mm.

20. The bone conduction vibrator according to any one of claims 1 to 12, characterized in that: In the length direction of the magnetic conductive plate assembly (4), the interval L5 between the two magnetic conductive plates (40) is not less than 0.2 mm.

21. The bone conduction vibrator according to any one of claims 1 to 12, characterized in that: The bone conduction vibrator comprises two groups of reset components (5), and the two groups of reset components (5) are symmetrically arranged on both sides of the magnetic conductive plate component (4) in the thickness direction.

22. An electronic device, characterized in that: Comprising the bone conduction vibrator according to any one of claims 1 to 21.

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