Bone conduction vibrator and electronic device

Abstract

The utility model discloses a kind of bone conduction vibrator and electronic equipment, it is related to acoustic technical field, bone conduction vibrator includes shell assembly, permanent magnetic circuit system, two coils, magnetic conductive plate assembly and reset component. Permanent magnetic circuit system includes two groups of magnet component and iron component, each group of magnet component includes two magnets of opposite poles, the magnetization direction of magnet of two groups of magnet component is same, two magnetic poles of magnet are arranged along the vibration direction of bone conduction vibrator;Two coils are located at the two sides of permanent magnetic circuit system, the magnetic field direction generated by two coils at the same time is opposite;Magnetic conductive plate assembly is arranged in two coils, and located between two magnets of magnet component, two ends of magnetic conductive plate assembly are realized magnetic conduction by the part between two ends;Reset component is connected between magnetic conductive plate assembly and permanent magnetic circuit system. By two coils and two groups of magnet component cooperation drive magnetic conductive plate assembly vibration, it is beneficial to make bone conduction vibrator have greater driving force and sensitivity.

Description

Technical Field

[0001] This utility model relates to the field of acoustic technology, and in particular to a bone conduction vibrator and electronic device. Background Technology

[0002] Bone conduction transducers, also known as bone conduction loudspeakers, are transducers that convert electrical signals into mechanical vibrations of corresponding frequencies. The mechanical vibrations generated by the bone conduction transducer are transmitted through the skull to the auditory center, thus enabling people to hear sound. Bone conduction transducers are widely used in wearable electronic devices such as headphones, hearing aids, smart helmets, and smart glasses.

[0003] Chinese patent CN202334867U discloses a moving iron microphone unit for bone conduction hearing aids and speaker devices. It includes a vibration transmission device, an armature, a diaphragm, two magnetic cores, two magnetic plates, and an electromagnetic induction coil. The armature is inserted into the electromagnetic induction coil and located between the two magnetic plates. The fixed end of the armature, the magnetic cores, the magnetic plates, and the electromagnetic induction coil are fixed together. The free end of the armature is connected to the vibration transmission device. When the coil is energized, the armature is polarized, and its interaction with the magnetic field of the magnetic plates causes the drive magnet mechanism composed of the armature, the magnetic cores, the magnetic plates, and the electromagnetic induction coil to vibrate and displace, thereby realizing bone conduction sound transmission.

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

[0005] For example, the reset of the aforementioned moving iron microphone unit relies on the elasticity of the armature. The armature has a large stiffness coefficient, 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, 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 approximately swings around the free end as the fulcrum, resulting in low vibration efficiency and easily leading to a deterioration in the listening effect.

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

[0008] In summary, the above-mentioned structure still has room for improvement in terms of sound production effect, sensitivity enhancement, 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. Utility Model Content

[0010] The purpose of this invention is to provide a bone conduction vibrator and electronic device to improve its sensitivity.

[0011] To achieve the aforementioned objectives, this utility model proposes, on the one hand, a bone conduction oscillator, comprising:

[0012] A housing assembly made of a magnetically conductive material;

[0013] A permanent magnet circuit system is disposed within the outer shell assembly. The permanent magnet circuit system includes an iron edge assembly and two sets of magnet assemblies. The magnet assemblies form a magnetic circuit through the iron edge assembly. Each set of magnet assemblies includes two magnets with opposite poles. The magnetization directions of the magnets in both sets of magnet assemblies are the same. The two magnetic poles of the magnets are arranged along the vibration direction of the bone conduction oscillator.

[0014] Two coils are disposed inside the housing assembly, and the two coils are respectively located on both sides of the permanent magnet circuit system. The magnetic fields generated by the two coils at the same time are in opposite directions.

[0015] A magnetic guide plate assembly, passing through the two coils and located between the two magnets of the magnet assembly, wherein magnetic conduction is achieved at both ends of the magnetic guide plate assembly through the portion between the two ends; and,

[0016] A reset assembly, connected between the magnetic plate assembly and the permanent magnet circuit system, includes a spring for providing elastic force.

[0017] Furthermore, the magnetic plate assembly includes a magnetic plate with both ends extending beyond the two coils.

[0018] Furthermore, the magnetic plate assembly includes two magnetic plates arranged along the length of the magnetic plate assembly, with adjacent ends of the two magnetic plates magnetically connected, and both ends of the entire assembly of the magnetic plates extending beyond the two coils.

[0019] Furthermore, the adjacent ends of the two magnetic plates are in direct contact.

[0020] Furthermore, the two surfaces of all the magnetic plates are flush in the direction of vibration.

[0021] Furthermore, the magnetic plate assembly includes two outer frame bodies respectively connected to the two magnetic plates. Each outer frame body includes a middle portion and side arms connected to both ends of the middle portion. The two side arms extend in the same direction. The magnetic plate is connected to the middle portion and located between the two side arms. The outer shell assembly includes a first shell and a second shell. The outer frame body is sandwiched between the first shell and the second shell. The outer frame body is integrally formed with the magnetic plate.

[0022] Furthermore, the magnetic plate assembly also includes a gasket disposed on the surface of the magnetic plate, the gasket being at least partially located between the magnetic plate and the magnet, the gasket being made of a non-magnetic material and having a hardness less than that of the magnetic plate.

[0023] Furthermore, the magnetic guide plate assembly is fixed relative to the housing assembly, or the permanent magnet circuit system is fixed relative to the housing assembly.

[0024] Furthermore, the two sets of magnet assemblies are spaced apart along the length of the magnetic guide plate assembly, and the two magnets of each set of magnet assemblies are located on both sides of the thickness direction of the magnetic guide plate assembly, the thickness direction of the magnetic guide plate assembly being consistent with the vibration direction of the bone conduction vibrator.

[0025] Furthermore, the edge iron assembly is provided with a channel extending along the length of the magnetic guide plate assembly, and the two magnets of each set of magnet assemblies are connected to the inner surface of the edge iron assembly.

[0026] Furthermore, the coil is connected to the outer surface of the permanent magnet circuit system and is fixed relative to the permanent magnet circuit system; or, the coil is connected to the reset assembly and is fixed relative to the magnetic plate assembly.

[0027] Furthermore, the two ends of the magnetic plate assembly extend beyond the two ends of the two coils, the two ends of the reset assembly are respectively connected to the two ends of the magnetic plate assembly, and the middle part is connected to the permanent magnet circuit system.

[0028] On the other hand, this invention proposes an electronic device that includes the bone conduction oscillator as described above.

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

[0030] According to some embodiments of this utility model, the bone conduction vibrator includes two sets of magnet assemblies and two coils. The magnets in both sets of magnet assemblies are magnetized in the same direction, and the two magnetic poles of the magnets are arranged along the vibration direction of the bone conduction vibrator. Magnetic conduction is achieved at both ends of the magnetic plate assembly through the portion between the two ends. The two coils are located on both sides of the permanent magnet circuit system, and the magnetic field directions of the two coils are opposite at the same time. By having the two coils jointly polarize the portion of the magnetic plate assembly located between the two coils, an interaction force is generated between it and the magnetic fields of the two sets of magnet assemblies, causing the magnetic plate assembly and the permanent magnet circuit system to vibrate relative to each other. This is beneficial for increasing the driving force and improving sensitivity. In addition, by using a spring to provide the restoring force, the overall stiffness coefficient (K value) can be made smaller, which is beneficial for reducing the low-frequency resonant frequency (low-frequency F0) of the vibration system, resulting in higher low-frequency sensitivity and better bass performance. Attached Figure Description

[0031] Figure 1 This is a three-dimensional schematic diagram of a bone-guided oscillator in some embodiments of this utility model.

[0032] Figure 2 yes Figure 1 The diagram shows a three-dimensional representation of a bone conduction oscillator, in which the outer casing assembly is separated.

[0033] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of the bone conductor oscillator.

[0034] Figure 4 yes Figure 3 The diagram shows a magnetic circuit of the magnetic field generated at a certain moment after the coil of the bone conductor oscillator is energized.

[0035] Figure 5 yes Figure 3 The diagram shows a cross-sectional view of a portion of the bone conductor oscillator.

[0036] Figure 6 yes Figure 1 The exploded view of the bone conductor oscillator is shown.

[0037] Figure 7 yes Figure 1 The diagram shows a magnetic circuit formed by the magnet assembly and the edge iron assembly in the bone conductor oscillator.

[0038] Figure 8 This is a schematic diagram of each magnet component corresponding to a set of edge iron components in some embodiments of this utility model.

[0039] Figure 9 This is a three-dimensional schematic diagram of the edge iron assembly of some embodiments of this utility model.

[0040] Figure 10 yes Figure 1The diagram shows the location of the permanent magnet circuit system and the magnetic plate assembly of the bone conductor oscillator.

[0041] Figure 11 This is a perspective view of a magnetic guide plate assembly according to some embodiments of the present invention. Two gaskets are provided on the upper and lower surfaces of the magnetic guide plate.

[0042] Figure 12 yes Figure 1 The diagram shown is a cross-sectional view of the bone conductor without the housing assembly.

[0043] Figure 13 This is a three-dimensional schematic diagram of the spring sheet in some embodiments of this utility model.

[0044] Figure 14 The figure shows a three-dimensional schematic diagram of the bone conduction vibrator in some embodiments of this utility model when the outer shell assembly is not shown. In the figure, the reset assembly includes two springs.

[0045] Figure 15 yes Figure 14 The diagram shows a cross-sectional view of the bone conductor oscillator.

[0046] Figure 16 This is a cross-sectional schematic diagram of a bone conductor vibrator in some embodiments of this utility model.

[0047] Figure 17 This is a perspective view of the bone guide vibrator of some embodiments of the present invention when the outer shell assembly is not shown. In the figure, each suspended part of the spring has a hole.

[0048] Figure 18 This is a three-dimensional schematic diagram of the reset assembly of some embodiments of the present invention. In the figure, each suspended part of the spring has two holes.

[0049] Figure 19 This is a three-dimensional schematic diagram of a bone-guided oscillator in some embodiments of this utility model.

[0050] Figure 20 yes Figure 19 The exploded view of the bone conductor oscillator is shown.

[0051] Figure 21 yes Figure 19 The diagram shows a three-dimensional representation of a bone conduction oscillator, in which the outer casing assembly is separated.

[0052] Figure 22 yes Figure 19 The diagram shows the connection between the outer support of the bone conduction oscillator and the magnetic plate.

[0053] Figure 23 yes Figure 19 The diagram shows the two outer supports of the bone conduction oscillator connected in a ring shape.

[0054] Figure 24 This is a three-dimensional schematic diagram of a bone conduction oscillator according to some embodiments of the present invention. In the diagram, the outer shell assembly is separated.

[0055] Figure 25 yes Figure 24 The diagram shows a cross-sectional view of the bone conductor oscillator.

[0056] Figure 26 yes Figure 25 The diagram shows the connection between the coil and the connecting plate in the bone conductor oscillator.

[0057] Figure 27 This is a perspective view of the bone conduction vibrator of some embodiments of the present invention when the outer shell assembly is not shown. In the figure, the reset assembly includes two spring contacts.

[0058] Figure 28 This is a three-dimensional schematic diagram of a bone conduction oscillator according to some embodiments of the present invention. In the diagram, the outer shell assembly is separated.

[0059] Figure 29 yes Figure 28 The diagram shows a cross-sectional view of the bone conductor oscillator.

[0060] Figure 30 This is a three-dimensional schematic diagram of a bone conduction oscillator according to some embodiments of the present invention. In the diagram, the outer shell assembly is separated.

[0061] Figure 31 yes Figure 30 The diagram shows a cross-sectional view of one half of the bone conductor oscillator, with the other half being symmetrical to it.

[0062] Figure 32 This is a cross-sectional schematic diagram of a bone conductor vibrator in some embodiments of this utility model.

[0063] Figure 33 This is a perspective view of the bone guide vibrator of some embodiments of the present invention when the outer shell assembly is not shown. In the figure, each suspended part of the spring has a hole.

[0064] Figure 34 This is a three-dimensional schematic diagram of a bone conduction oscillator according to some embodiments of the present invention. In the diagram, the outer shell assembly and the spacer are separated.

[0065] Figure 35 yes Figure 34 The diagram shows a cross-sectional view of the bone conductor oscillator.

[0066] Figure 36 This is a cross-sectional schematic diagram of a bone conductor vibrator in some embodiments of this utility model.

[0067] Figure 37This is a cross-sectional schematic diagram of a bone conductor vibrator in some embodiments of this utility model.

[0068] Figure 38 This is a cross-sectional schematic diagram of a bone conductor vibrator in some embodiments of this utility model. Detailed Implementation

[0069] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0070] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0071] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0072] Some embodiments of this utility model propose a bone-guided oscillator, such as... Figures 1 to 3 As shown, it includes main components such as housing assembly 1, permanent magnet circuit system 2, coil 3, magnetic guide plate assembly 4, and reset assembly 5. The permanent magnet circuit system 2, coil 3, magnetic guide plate assembly 4, and reset assembly 5 are all located inside the housing assembly 1.

[0073] 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 arranged with opposite poles. Opposite poles mean that the magnetic poles of the two magnets 210 are opposite. For example... Figure 3In the illustrated embodiment, the two opposing magnetic poles of the upper magnet 210 and the lower magnet 210 are the S pole and the N pole, respectively. It is understood that the polarities can also be reversed. Optionally, the two sets of magnet assemblies 21 are spaced apart along the length of the magnetic guide plate assembly 4 to reduce magnetic interference between adjacent magnets in the length direction.

[0074] In some embodiments, the number of coils 3 is two. For example... Figure 3 As shown, the two coils 3 are located on both sides of the permanent magnet circuit system 2. Specifically, the two coils 3 are spaced apart along the length of the magnetic guide plate assembly 4, with the permanent magnet circuit system 2 located between the two coils 3.

[0075] The magnetic plate assembly 4 is inserted within the two coils 3 and located between the two magnets 210 of the magnet assembly 21. Magnetic conduction is achieved at both ends of the magnetic plate assembly 4 through a portion located between its ends. The magnetic fields generated by the two coils 3 at the same time are in opposite directions. When the coils 3 are energized, the portion of the magnetic plate assembly 4 located along its length between the two coils 3 (hereinafter referred to as the middle portion) will be polarized into an N pole or a S pole, thereby generating an attractive or repulsive force with the magnets 210. For example… Figure 4 In the example shown, the portion of the magnetic plate assembly 4 located between the two coils 3 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, while the permanent magnet circuit system 2 is subjected to a downward magnetic force. Since the magnetic plate 40 is fixed relative to the outer shell assembly 1, the permanent magnet circuit system 2 will move downward relative to the magnetic plate 40. When the polarity of the middle portion of the magnetic plate assembly 4 changes to the S pole, the permanent magnet circuit system 2 will move upward relative to the magnetic plate 40.

[0076] Understandably, when alternating current is synchronously applied to the two coils 3, ensuring that the direction of the magnetic force between the magnetic plate assembly 4 and the corresponding magnet assembly 21 is always the same at any given moment, the permanent magnet circuit system 2 will move in the same direction relative to the magnetic plate assembly 4, thereby generating linear reciprocating vibration and achieving bone conduction sound transmission. By having the two coils 3 jointly polarize the middle part of the magnetic plate assembly 4, a stronger driving force can be generated, improving the overall sensitivity of the bone conduction vibrator.

[0077] The reset component 5 is connected between the magnetic plate assembly 4 and the permanent magnet circuit system 2, enabling relative displacement between them. When either the magnetic plate assembly 4 or the permanent magnet circuit system 2 deviates from its initial position, it provides a reset force to return them to their initial position. The initial position refers to the position of the magnetic plate assembly 4 and the permanent magnet circuit system 2 when the bone conduction vibrator is not energized. 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 component 5 includes a spring piece 50 for providing elasticity, which resets the magnetic plate assembly 4 or the permanent magnet circuit system 2.

[0078] Understandably, with two sets of magnet assemblies 21 and two coils 3, the bone conduction oscillator will generate greater driving force, improving both its sensitivity and loudness, thus enhancing the listening experience. Furthermore, by providing the restoring force through the spring 50, the overall stiffness coefficient (K value) can be made smaller, which helps to reduce the low-frequency resonant frequency (low-frequency F0) of the vibration system, resulting in higher low-frequency sensitivity and better bass performance.

[0079] It is understandable that the vibration component of the bone conduction oscillator can be changed by fixing the magnetic plate assembly 4 or the permanent magnet circuit system 2.

[0080] In some embodiments, with Figure 3 and Figure 16 Taking the structure shown as an example, the magnetic plate assembly 4 and the outer shell assembly 1 are relatively fixed. When the bone conduction vibrator is working, the permanent magnet circuit system 2 will vibrate relative to the outer shell assembly 1. Because the permanent magnet circuit system 2 has a relatively large mass, it can provide a greater vibration and is beneficial for further reducing the low-frequency F0, thus improving the low-frequency acoustic performance. It can be understood that when the coil 3 is relatively fixed to the permanent magnet circuit system 2 (e.g., ...), ... Figure 3 In the illustrated embodiment, when the two move synchronously, the mass of the vibrating part of the bone conduction oscillator will be further increased, thereby further improving the low-frequency sound effect. When the coil 3 and the reset assembly 5 are relatively fixed (e.g., Figure 16 In the illustrated embodiment, since the mass of the vibrating 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 low-frequency performance and response speed.

[0081] In some embodiments, with Figures 35 to 38Taking the structure shown as an example, the permanent magnet circuit system 2 is fixed relative to the housing assembly 1. 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 typically smaller than that of the permanent magnet circuit system 2, the magnetic plate assembly 4 usually responds faster to the electrical signal from the coil 3, which helps improve the overall sensitivity. It is understood that by fixing the coil 3 relative to the reset assembly 5 (e.g., ...), ... Figure 37 and Figure 38 (As shown in the embodiment), when the two move synchronously, the mass of the vibrating part of the bone conductor oscillator can be increased, which helps to achieve a better balance between improving low-frequency performance and response speed.

[0082] In this paper, the vibration direction of the bone guide oscillator is the vibration direction of the permanent magnet circuit system 2 or the magnetic guide plate assembly 4 during operation. It is consistent with the thickness direction of the magnetic guide plate assembly 4, which can reduce the thickness of the bone guide oscillator and increase the relative area of ​​the magnetic guide plate assembly 4 and the magnet 210, thereby improving the driving force.

[0083] In this article, the magnetic plate assembly 4 and the bone guide vibrator are aligned in the same length direction.

[0084] Understandably, in order for the vibrating part of the bone guide oscillator to vibrate reliably, there is a vibration space between the vibrating part and the stationary fixed part in the vibration direction, so as not to let the fixed part hinder the movement of the vibrating part. For example... Figure 5 As shown, Figure 5 It shows Figure 3 As part of the structure shown, in the vibration direction, there is a first gap D1 between the inner wall of the coil 3 and the magnetic plate 40 of the magnetic plate assembly 4; a second gap D2 between the magnet 210 and the magnetic plate 40 of the magnetic plate assembly 4; a third gap D3 between the spring 50 and the outer shell assembly 1; and a fourth gap D4 between the spring 50 and the coil 3, to provide vibration space. Optionally, the first gap D1, the third gap D3, and the fourth gap D4 are all greater than the second gap D2, and the distance between the magnetic plate assembly 4 and the magnet 210 is relatively closer, which is beneficial to increase the driving force, accelerate the vibration response, and at the same time, help to avoid noise caused by the impact of other parts during vibration.

[0085] The following section provides examples illustrating the relevant content of the outer casing component 1.

[0086] In some embodiments, the housing assembly 1 is formed by connecting multiple housings; in this document, "multiple" means two or more. For example... Figure 1 and Figure 2 As shown, the outer casing assembly 1 includes a first casing 10 and a second casing 11. Both the first casing 10 and the second casing 11 include a substrate 100 and a frame 101 protruding from the outer edge of the substrate 100.

[0087] The first housing 10 and the second housing 11 are connected by a frame 101. The frame 101 is annular.

[0088] In the illustrated embodiment, the housing assembly 1 is generally rectangular.

[0089] In some embodiments, the housing assembly 1 is made of a magnetically conductive material, and the magnetic field generated by the coil 3 when energized forms a magnetically conductive circuit through the housing assembly 1 to increase the utilization of the magnetic field, which can more efficiently polarize the magnetic plate 40 and improve the driving force.

[0090] like Figure 4 As shown, Figure 4 In the illustrated embodiment, the two ends of the magnetic plate assembly 4 are connected to the outer shell assembly 1. After the coil 3 is energized, the magnetic field lines are emitted from the middle part of the magnetic plate assembly 4, pass through the magnet 210, the edge iron assembly 22, the base plate 100 of the outer shell assembly 1 and the frame 101, and return to the outer end of the magnetic plate assembly 4 (i.e. the end of the magnetic plate assembly 4 near the frame 101), forming a magnetic circuit. Figure 4 The schematic diagram of the magnetic circuit is shown in the dashed line with arrows. It can be understood that when the middle part of the magnetic plate assembly 4 is polarized to the S pole, the direction of the magnetic field lines is reversed.

[0091] like Figure 31 As shown, Figure 31 In the illustrated embodiment, the two ends of the magnetic plate assembly 4 are spaced apart from the outer casing assembly 1. After the coil 3 is energized, the magnetic field lines are emitted from the middle part of the magnetic plate assembly 4, pass through the magnet 210, the edge iron 220, the substrate 100 of the outer casing assembly 1 and the frame 101, and return to the end of the magnetic plate assembly 4, forming a magnetic circuit. Figure 31 The schematic diagram of the magnetic circuit is shown in the dashed line with arrows. It can be understood that when the inner end of the magnetic plate assembly 4 is polarized to the S pole, the direction of the magnetic field lines is reversed.

[0092] Optionally, in the thickness direction of the magnetic plate assembly 4, the distance L1 between the front iron assembly 22 and the inner wall of the outer casing assembly 1 (specifically, the inner wall of the substrate 100) does not exceed 1 mm, and in the length direction of the magnetic plate assembly 4, the distance L2 between the magnetic plate assembly 4 and the inner wall of the outer casing assembly 1 (specifically, the inner wall of the frame 101) does not exceed 1 mm, so that the magnetic material can efficiently guide magnetic field lines to form a loop. Further optionally, the distance L1 does not exceed 0.6 mm, and the distance L2 does not exceed 0.6 mm, to further improve the efficiency of forming a magnetic loop.

[0093] The following section provides examples to illustrate the relevant content of permanent magnet circuit system 2.

[0094] like Figure 3As shown, the two magnets 210 of each magnet assembly 21 are located on both sides of the thickness direction of the magnetic guide plate assembly 4, so that the magnets 210 are arranged opposite to the surface (i.e., the upper surface or the lower surface) of the magnetic guide plate assembly 4 in the thickness direction. Since the surface area in the thickness direction is relatively larger, the distance between the two opposing magnets 210 is relatively smaller, which is beneficial to increasing the driving force.

[0095] In some embodiments, the magnetization directions of the two sets of magnet assemblies 21 are the same, that is, the magnetic poles of the magnets 210 are arranged in the same direction, both along the thickness direction of the magnetic conductive plate assembly 4, and the arrangement order of the two magnetic poles is also the same, for example... Figure 4 In the illustrated embodiment, both magnetic 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 magnetic fields generated by the two coils 3 at the same time are in opposite directions, so that the middle portion of the magnetic plate assembly 4 can be reliably polarized to either the N or S pole, and the polarity of the middle portion can be reliably switched as the direction of the magnetic field of the coils 3 changes. Since all magnets 210 are magnetized in the same direction, magnetization is easier.

[0096] like Figure 3 , Figure 6 and Figure 7 As shown, the permanent magnet circuit system 2 includes a front iron assembly 22. The front iron assembly 22 is provided with a channel 221 that runs through the length of the magnetic guide plate 40. The two magnets 210 of each magnet assembly 21 are connected to the inner surface 22a of the front iron assembly 22.

[0097] In some embodiments, such as Figure 3 As shown, the two sets of magnet assemblies 21 share a common set of edge iron assemblies 22, and the two sets of magnet assemblies 21 are located within the channel 221 of the same edge iron assembly 22. This improves the compactness of the structure, allowing the permanent magnet circuit system 2 to be assembled as a whole, making installation easier, while also increasing the mass of the permanent magnet circuit system 2.

[0098] In some embodiments, such as Figure 8 As shown, each set of magnet assemblies 21 has a corresponding set of edge iron assemblies 22. The two sets of magnet assemblies 21 are respectively disposed in the channels 221 of the two sets of edge iron assemblies 22, and the two sets of edge iron assemblies 22 are spaced apart along the length direction of the magnetic guide plate assembly 4. Optionally, both sets of edge iron assemblies 22 are connected to the same spring piece 50, so that they can be assembled into a whole by the spring piece 50 and then installed, which facilitates ensuring the relative position of the two sets of edge iron assemblies 22.

[0099] In some embodiments, the front guard assembly 22 is formed by connecting a plurality of front guards 220. Figure 9In the illustrated embodiment, the edge arm assembly 22 includes two edge arms 220, each of which includes a base plate 2200 and side plates 2201 protruding from both sides of the base plate 2200. The two edge arms 220 are connected through the side plates 2201. The two magnets 210 of the magnet assembly 21 are respectively connected to the base plates 2200 of the two edge arms 220. The magnet assembly 21 can form a magnetic circuit through the edge arm assembly 22, thereby improving the magnetic field utilization rate and increasing the driving force. Figure 7 In the diagram, the magnetic circuit of the magnet assembly 21 is indicated by a dashed line with an arrow. The magnetic field lines emitted from the N pole of the upper magnet 210 pass sequentially through the upper base plate 2200, the upper side plate 2201, the lower side plate 2201, and the lower base plate 2200 before entering the S pole of the lower magnet 210. The magnetic field lines emitted from the N pole of the lower magnet 210 enter the S pole of the upper magnet 210 from the air gap, thus forming a closed loop.

[0100] In some embodiments, such as Figure 10 As shown, the outer surface 220a of the edge arm assembly 22 and the outer surface 210b of the adjacent magnet 210 are flush. The outer surface refers to the side of the edge arm assembly 22 and the magnet 210 near the end of the bone guide oscillator. In this way, the edge arm assembly 22 and the magnet 210 can be fully utilized, improving the compactness of the structure and reducing the length dimension of the bone guide oscillator.

[0101] The following section provides examples illustrating the relevant aspects of the magnetic conductive plate assembly 4.

[0102] The magnetic plate assembly 4 is strip-shaped, with its length greater than its width and its width greater than its thickness.

[0103] In some embodiments, such as Figure 3 As shown, the magnetic plate assembly 4 includes a magnetic plate 40, which passes between the magnetic circuit system 2 and the two coils 3, with both ends extending beyond the coils 3. When the two coils 3 are energized, the portion of the magnetic plate 40 located between the two coils 3 is polarized as either the N pole or the S pole, with the polarities at both ends of the magnetic plate 40 being opposite. Because the magnetic plate 40 is a single, integrally formed part, it has better structural strength and relatively better magnetic permeability. Optionally, the magnetic plate 40 has a uniform thickness, meaning its thickness is the same everywhere.

[0104] In some embodiments, such as Figure 23 As shown, the magnetic plate assembly 4 includes two magnetic plates 40, which are arranged along the length of the assembly. The adjacent ends of two adjacent magnetic plates 40 are in contact, for example, their end faces are abutted, or they can be fixed by adhesive or welding. The two ends of the entire assembly of all the magnetic plates 40 extend beyond the two coils 3. Figure 23In the illustrated embodiment, the magnetic plate assembly 4 includes two magnetic plates 40 of equal length. When the two coils 3 are energized, the two coils 3 simultaneously polarize the portions of the two magnetic plates 40 located between the two coils 3 to the same polarity.

[0105] Optionally, the two surfaces of the two magnetic plates 40 are flush in the vibration direction (i.e., the upper surfaces of the two magnetic plates 40 are flush, and the lower surfaces of the two magnetic plates 40 are flush) to make full use of the space, ensure the consistency of the width of the magnetic gap between the magnetic plates 40 and the magnet 210, and make the overall thickness of the magnetic plate assembly 4 smaller, and the overall thickness of the bone guide vibrator also smaller.

[0106] It is understood that in some embodiments, such as Figure 3 and Figure 11 As shown, the magnetic plate assembly 4 also includes a pad 44 disposed on the surface of the magnetic plate 40 in the vibration direction. The pad 44 is at least partially located between the magnetic plate 40 and the magnet 210, and is made of a non-magnetic material. This prevents the magnet 210 from being stuck after contacting the magnetic plate 40, thus improving the reliability of the bone conduction oscillator. Optionally, the hardness of the pad 44 is less than that of the magnetic plate 40, so that the pad 44 can provide impact protection. Further, the pad 44 is made of a soft material (e.g., rubber). The number of pads 44 on the upper or lower surface of the magnetic plate 40 can be one or more. Figure 3 In the illustrated embodiment, a pad 44 is provided on both the upper and lower surfaces of the magnetic plate 40. Figure 11 In the illustrated embodiment, two pads are provided on both the upper and lower surfaces of the magnetic plate 40.

[0107] It is understandable that the thickness, width, and length of the magnetic conductive plate 40 are consistent with those of the magnetic conductive plate assembly 4.

[0108] Optional, see reference Figure 5 The length L3 of the portion of the pad 44 located between the magnet 210 and the magnetic plate 40 is not less than one-third of the length L4 of the magnet 210, so that it can reliably play a collision-proof role.

[0109] In some embodiments, the magnetic plate assembly 4 is fixed relative to the housing assembly 1.

[0110] As a feasible example, the two ends of the magnetic plate assembly 4 are fixedly connected to the housing assembly 1, for example, such as... Figures 1 to 3As shown, the magnetic plate assembly 4 includes a magnetic plate 40. The two ends of the magnetic plate assembly 4 (i.e. the ends of the magnetic plate 40 near the outer shell assembly 1) are clamped between the first shell 10 and the second shell 11. Both the first shell 10 and the second shell 11 are provided with mounting grooves 102 that are adapted to the ends of the magnetic plate 40. The mounting grooves 102 on the two shells cooperate to accommodate the magnetic plate 40. In other embodiments, only one shell may be provided with a mounting groove 102 adapted to the magnetic plate 40.

[0111] As another feasible example, such as Figures 19 to 23 As shown, the magnetic plate assembly 4 includes two magnetic plates and two outer frame bodies 41 respectively connected to the two magnetic plates 40. The outer frame bodies 41 are generally U-shaped, and their shape after being connected to the magnetic plates 40 is generally E-shaped. Specifically, the outer frame body 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 plates 40 are connected to the middle portion 410 and located between the two side arms 411. The outer frame body 41 is clamped between the first housing 10 and the second housing 11, so that the magnetic plate assembly 4 is fixedly connected to the outer housing assembly 1. Optionally, the outer frame body 41 and the magnetic plates 40 are integrally formed. In some embodiments, the two outer frame bodies 41 are spaced apart and do not contact each other. In other embodiments, such as Figure 23 As shown, the side arms 411 of the two outer frame bodies 41 are connected to each other to form a ring. Optionally, the outer surface of the outer frame body 41 is flush with the outer surface of the outer shell assembly 1, which is more aesthetically pleasing.

[0112] As another feasible example, such as Figure 28 and Figure 29 As shown, the two ends of the magnetic plate assembly 4 are connected to the outer shell assembly 1 through the connecting plate 53 to achieve relative fixation between the magnetic plate assembly 4 and the outer shell assembly 1.

[0113] As another feasible example, such as Figures 30 to 32 As shown, the two ends of the magnetic plate assembly 4 are connected to the outer shell assembly 1 through the support pads 6 to achieve relative fixation between the magnetic plate assembly 4 and the outer shell assembly 1.

[0114] The following section provides examples illustrating the relevant content of reset component 5.

[0115] The reset component 5 is located on one side of the magnetic plate assembly 4 in the vibration direction to provide elastic force along the vibration direction. There are various ways to connect the reset component 5 to the permanent magnet circuit system 2 and the magnetic plate assembly 4, which are illustrated below.

[0116] In some embodiments where the reset component 5 is connected to the permanent magnet circuit system 2 and the magnetic guide plate assembly 4, such as Figure 12 and Figure 13As shown, the reset assembly 5 includes two fixing plates 51 located at its two ends and a connecting plate 52 connecting the spring plate 50 and the fixing plates 51. The spring plate 50 and the permanent magnet circuit system 2 are connected to the outer surface 2a of the magnetic guide plate 40 away from each other in the vibration direction (in the figure, this outer surface is the outer surface of the edge iron assembly 22). The two fixing plates 51 are respectively located on both sides of the two coils 3 along the length direction of the magnetic guide plate assembly 4 and connected to the magnetic guide plate 40. The spring plate 50 has a first fixing part 500 located in its middle and connected to the permanent magnet circuit system 2, and a suspended part 501 located between the first fixing part 500 and the connecting plate 52. The reset assembly 5 mainly provides the reset force through the elastic deformation of the suspended part 501. There is a vibration space between the suspended part 501 of the spring plate 50 and the coil 3.

[0117] Optionally, the spring 50, connecting piece 52, and fixing piece 51 are integrally formed, for example by integrally bending a metal sheet, to reduce the overall number of parts, facilitate assembly, and improve assembly accuracy.

[0118] Optionally, the fixing plate 51 is connected to the surface 40a of the magnetic plate 40 facing the spring plate 50, and the connecting plate 52 is arranged parallel to the vibration direction and perpendicular to the spring plate 50 and the fixing plate 51. This can improve the support performance of the connecting plate 52 and provide more space to accommodate 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.

[0119] In other embodiments where the reset component 5 is connected to the permanent magnet circuit system 2 and the magnetic guide plate assembly 4, such as Figures 24 to 27 As shown, the spring 50 and the permanent magnet circuit system 2 are connected away from the outer surface 2a of the magnetic guide plate 40 in the vibration direction (in the figure, the outer surface is the outer surface of the iron plate assembly 22). Its two ends extend beyond the permanent magnet circuit system 2 along the length direction of the magnetic guide plate assembly 4, and extend towards the sides where the two coils 3 are located. The reset assembly 5 and its spring piece 50 extend beyond the two ends of the two coils 3 along the length of the magnetic plate assembly 4. The reset assembly 5 includes two connecting plates 53 located at the two ends of the two coils 3 along the length of the magnetic plate assembly 4. The connecting plates 53 are connected between the spring piece 50 and the magnetic plate 40. The part of the spring piece 50 connected to the permanent magnet circuit system 2 is its first fixing part 500, and the part connected to the connecting plate 53 is its second fixing part 502. The part located between the first fixing part 500 and the second fixing part 502 is its suspended part 501. The reset assembly 5 mainly provides the reset force through the elastic deformation of the suspended part 501. The suspended part 501 of the spring piece 50 is arranged opposite to the coil 3, and there is a vibration space between them.

[0120] Optional, such as Figure 25 and Figure 26As shown, the connecting plate 53 is connected to the surface 40a of the magnetic plate 40 facing the spring piece 50, and the surface of the connecting plate 53 facing away from the magnetic plate 40 is connected to the surface of the connecting plate 53 to facilitate fixation. The connecting plate 53 is arranged parallel to the vibration direction and perpendicular to the spring piece 50.

[0121] Optionally, the spring sheet 50 is flat, with its thickness direction aligned with the vibration direction of the bone guide oscillator, so that it can undergo elastic deformation along the vibration direction, and the deformation amplitude on the upper and lower sides is more consistent, while saving space in the thickness direction of the bone guide oscillator.

[0122] In some embodiments, such as Figure 3 and Figure 25 As shown, the bone guide 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 plate assembly 4, so that when the bone guide vibrator is working, the vibration of the vibrating part is more stable and the linearity is better.

[0123] In some embodiments, the bone conduction vibrator includes two sets of reset components 5, and the spring pieces 50 of the two sets of reset components 5 are symmetrically arranged. The connecting plates 53 of the two sets of reset components 5 have different structures. For example Figure 28 and Figure 29 As shown, two connecting plates 53 located on the same side (lower side in the figure) of the magnetic conductive plate 40 along its thickness direction are connected to the housing assembly 1, thereby fixing the magnetic conductive plate 40 and the housing assembly 1 relative to each other. The connecting plates 53 connected to the housing assembly 1 are provided with protruding support feet 530, which are connected to the housing assembly 1. Optionally, the support feet 530 are connected to the inner wall 100a of the substrate 100 of the housing assembly 1. There are two support feet 530, with the magnetic conductive plate 40 located between the two support feet 530 and positioned by them. 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.

[0124] It is understandable that the connecting plates 53 of both sets of reset components 5 can also be configured to have support feet 530, in which case the two sets of reset components 5 are symmetrical.

[0125] In some embodiments, the bone conduction vibrator includes two sets of repositioning components 5, and the two sets of repositioning components 5 are symmetrically arranged, for example... Figure 3 , Figure 30 and Figure 31 As shown. Figure 30 and Figure 31In the structure shown, the reset assembly 5 and the outer casing assembly 1 are connected by a support pad 6. The connecting plate 53 is approximately rectangular, and the support pad 6 is correspondingly disposed with the connecting plate 53 and connected between the end of the spring piece 50 (the second fixing part 502) and the base plate 100 of the outer casing assembly 1, thereby fixing the reset assembly 5 and the outer casing assembly 1 relative to each other. Optionally, the magnetic plate assembly 4 is provided with a support pad 6 on one side in the vibration direction, and both ends of the reset assembly 5 are provided with support pads 6 to improve support performance and facilitate assembly. Of course, support pads 6 can also be provided at both ends of both sets of reset assemblies 5 to further improve support performance.

[0126] Optionally, when the magnetic plate assembly 4 is connected to the housing assembly 1 via the connecting plate 53 or the supporting pad 6, the two ends of the magnetic plate assembly 4 along its length are spaced apart from the housing assembly 1, and the two do not contact each other. This eliminates the need to slot the housing assembly 1, simplifying the process and improving sealing. Further, optionally, the outer surface of the magnetic plate 40 is flush with the outer surface of the connecting plate 53 for easier positioning; the outer surface refers to the side of the magnetic plate 40 and the connecting plate 53 closest to the end of the housing assembly 1 along its length. As mentioned above, to reliably form a magnetic circuit, optionally, the distance L2 between the magnetic plate assembly 4 and the housing assembly 1 along the length of the magnetic plate assembly 4 does not exceed 1 mm. Of course, even if the magnetic plate assembly 4 is already connected to the housing assembly 1 via the connecting plate 53, it can still contact or be fixedly connected to the housing assembly 1 to further improve the connection strength and more reliably form a magnetic circuit.

[0127] It is understood that the number of spring pieces 50 included in the reset assembly 5 is not limited to one; it may also include two or more spring pieces 50. Each spring piece 50 is connected to the permanent magnet circuit system 2 away from the outer surface of the magnetic guide plate 40 in the vibration direction of the bone guide vibrator. At least two spring pieces 50 extend towards the sides where the two coils 3 are located, respectively, to be connected to both ends of the magnetic guide plate assembly 4 via connecting pieces 52, connecting plates 53, or other components. For example, Figure 14 , Figure 15 and Figure 27 In the illustrated embodiment, the reset assembly 5 includes two spring contacts 50. One end of each spring contact 50 is connected to the permanent magnet circuit system 2, and the other end extends along the length of the magnetic guide plate assembly 4 towards the side where the coil 3 is located, to connect with the connecting piece 52 or the connecting plate 53. The two spring contacts 50 extend in opposite directions, respectively towards the sides where the two coils 3 are located. The reset assembly 5 extends along the length of the magnetic guide plate assembly 4 beyond both ends of the two coils 3 and connects to both ends of the magnetic guide plate assembly 4. It can be understood that, with Figure 3The structure of a single spring piece 50 extending to both ends of the permanent magnet circuit system 2, as exemplified by this design, helps to increase the contact area between the spring piece 50 and the permanent magnet circuit system 2, thereby improving the connection effect. Simultaneously, the positional accuracy of the spring piece 50 can be more accurately guaranteed; for example, there is no need to adjust the relative positions of the two spring pieces 50, which also helps to reduce the number of parts and improve production efficiency.

[0128] It is understandable 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 circuit system 2. This makes the magnetic plate assembly 4 more symmetrical in terms of force, more stable in vibration, and better in terms of linearity.

[0129] The following examples illustrate the content related to shrapnel.

[0130] Understandably, since the thickness of the spring piece 50 is smaller than that of the magnetic plate 40, its stiffness coefficient is smaller, and the low-frequency resonant frequency of the bone conduction oscillator can be made lower, thereby improving the low-frequency effect. Furthermore, the spring piece 50 extends to connect with the connecting plate 53 or connecting piece 52 on the outside of the coil 3, which can make full use of the space inside the housing assembly 1, increase the length of the suspended part 501 of the spring piece 50, thereby reducing the stiffness coefficient of the spring piece 50 and improving the low-frequency effect. In addition, the suspended part 501 of the spring piece 50 does not need to be very thin in the width direction, making it less prone to damage and improving the reliability of the spring piece operation.

[0131] It is understandable that when the spring piece 50 and the magnetic plate assembly 4 are set in parallel, their width, length and thickness directions are consistent.

[0132] In some embodiments, at least a portion of the effective width B2 of the suspended portion 501 is less than the width B1 of the spring piece 50. The effective width of the suspended portion 501 refers to the minimum width of the solid portion of the suspended portion 501. Figure 17 In the illustrated embodiment, the effective width is the sum of B20 and B21. By adjusting the effective width of the suspended portion 501, the stiffness coefficient of the spring 50 can be adjusted. Setting the effective width B2 of the suspended portion 501 to be smaller than the width B1 of the spring 50 can effectively reduce the stiffness coefficient of the spring 50 and improve the low-frequency performance.

[0133] In some embodiments, the suspended portion 501 is provided with a hollow structure to reduce the effective width. As some feasible examples, the hollow structure includes a hole 503 that does not communicate with the sidewall of the spring piece 50 in the width direction. Figure 17 , Figure 18 and Figure 33 A schematic diagram is shown when the hollow structure includes a hole 503. In these embodiments, the effective width of the suspended portion 501 is less than its own width B4.

[0134] Optionally, the width of the suspended portion 501 is the same as the width of the contact area between the spring piece 50 and the permanent magnet circuit system 2 to improve its torsional resistance, thereby improving vibration stability and linearity. Optionally, the ratio of the width of the spring piece 50 to the width of the permanent magnet circuit system 2 is not less than 0.3 to ensure sufficient contact area with the permanent magnet circuit system 2, improve contact effect, and further ensure the torsional resistance of the spring piece 50. The width of the permanent magnet circuit system 2, i.e., the width of the edge iron assembly 22, refers to its widest point. In this document, 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 piece 50 is of uniform width.

[0135] It is understandable that the stiffness coefficient of the spring piece 50 can be adjusted by adjusting the number, area, shape and position of the holes 503 and the slots 504.

[0136] In some embodiments, such as Figure 17 and Figure 33 As shown, the hollow structure of each suspended part 501 includes a hole 503, which extends along the length direction of the spring piece 50. The length direction of the spring piece 50 is consistent with the length direction of the magnetic plate assembly 4. 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.

[0137] In some embodiments, the hollow structure includes at least two holes 503, which are spaced apart along the length or width direction of the spring piece 50. For example... Figure 18 As shown, the hollow structure of each suspended part 501 includes two holes 503, which are spaced apart along the length of the spring piece 50. It can be understood that, in addition to rectangles, the shape of the holes can also be rounded rectangles, ellipses, trapezoids, or triangles, etc., and the number of holes can be two, three, or more, and there can be one row of holes, two rows of holes, or multiple rows of holes.

[0138] It is understandable that the number of holes mentioned above refers to the number of holes in the hollow structure on a single suspended part 501.

[0139] The spring sheet 50 and the permanent magnet circuit system 2 can be connected by adhesive or welding. In some embodiments, the hollow structure extends at least partially to the outer surface of the permanent magnet circuit system 2, exposing the outer surface of the permanent magnet circuit system 2 to form a space for adhesive, thereby improving the connection strength of the adhesive bond. In some embodiments, the spring sheet 50 is made of a magnetically conductive material, which is beneficial for guiding magnetic field lines to form a loop and improving the magnetic conductivity. In other embodiments, the spring sheet 50 is made of a non-magnetically conductive material. Optionally, the spring sheet 50 is a spring steel sheet; more preferably, the spring sheet 50 is a stainless steel spring steel sheet.

[0140] The following examples illustrate the content related to coil 3.

[0141] There are two coils 3, which are located at both ends of the permanent magnet circuit system 2 along the length of the magnetic plate assembly 4.

[0142] In some embodiments, the coil 3 is fixed relative to the permanent magnet circuit system 2, such as... Figure 12 , Figure 25 , Figure 31 and Figure 35 As shown, the coil 3 is connected to the outer surface 2b of the permanent magnet circuit system 2, for example, by adhesive bonding. Optionally, the outer surface 210b of the magnet 210 is flush with the outer surface 220a of the edge iron assembly 22, so that the contact area between the coil 3 and the outer surface 2b of the permanent magnet circuit system 2 is larger and the connection strength is better. When the outer surface of the edge iron assembly 22 and the outer surface of the magnet 210 are not flush, the relatively convex surfaces of the two are the outer surface 2b of the permanent magnet circuit system 2.

[0143] When coil 3 is fixed relative to permanent magnet circuit system 2, it moves synchronously with permanent magnet circuit system 2. For example, in some embodiments, such as... Figure 3 , Figure 25 , Figure 28 and Figure 31 As shown, the magnetic plate assembly 4 is fixed relative to the housing assembly 1. During the operation of the bone-guided vibrator, the coil 3 and the permanent magnet circuit system 2 form a whole that vibrates relative to the magnetic plate assembly 4. The mass of its vibrating part is relatively large, which is beneficial for reducing the low-frequency resonant frequency. In some embodiments, such as Figures 34 to 36 As shown, the permanent magnet 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 magnet circuit system 2 and / or the reset assembly 5 (e.g., its spring 50). The connection method can be, for example, adhesive bonding. The two ends of the magnetic guide plate assembly 4 are spaced apart from the housing assembly 1 and do not contact each other. During the operation of the bone conduction vibrator, the magnetic guide plate assembly 4 ( Figure 36 ) or magnetic plate assembly 4 and connecting plate 53 ( Figure 35The overall structure formed by the spring plate 50 vibrates relative to the outer shell assembly 1, and its mass is relatively small, which is beneficial to increasing the response speed. The spacer plate 60 can be connected to the base plate 100 of the outer shell assembly 1 or to the frame 101 of the outer shell assembly 1. When it is connected to the base plate 100, it is easier to form a vibration space between the spring plate 50 and the base plate 100.

[0144] In some embodiments, the coil 3 is fixed relative to the magnetic plate assembly 4, and it can be connected to the reset assembly 5 to achieve relative fixation with the magnetic plate assembly 4. For example, in Figure 16 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 relative to the magnetic plate assembly 4. Optionally, the connecting piece 52 is arranged perpendicularly to the magnetic plate 40 to improve support performance and reduce or even prevent deformation of the connecting piece 52 during vibration. The surface 52a of the coil 3 and the connecting piece 52 facing the permanent magnet circuit system 2 can be glued together, for example. Optionally, the hollow structure extends to the surface of the coil 3 and the connecting piece 52 that contacts each other (i.e., the outer surface of the coil 3) to form an adhesive space and improve the bonding strength. For example, in... Figure 26 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 plate assembly 4. The coil 3 and the surface 53a of the connecting plate 53 facing the permanent magnet circuit system 2 can be bonded together, for example, with adhesive. Since the thickness of the connecting plate 53 is greater than the thickness of the connecting piece 52, its rigidity is relatively better. Therefore, the connecting plate 53 is not easily deformed during vibration and can reliably maintain the connection with the coil 3.

[0145] When coil 3 is fixed relative to magnetic plate assembly 4, it moves synchronously with magnetic plate assembly 4, for example... Figure 16 , Figure 26 , Figure 32 In the illustrated embodiment, the magnetic plate assembly 4 and the coil 3 are fixed relative to the housing assembly 1. When the bone conduction vibrator operates, the permanent magnet circuit system 2 vibrates relative to the housing assembly 1, while the magnetic plate assembly 4 and the coil 3 remain relatively stationary with respect to the housing assembly 1. For example, Figure 37 and Figure 38 In the illustrated embodiment, the permanent magnet circuit system 2 is fixed relative to the housing assembly 1, and the magnetic guide plate assembly 4 and coil 3 ( Figure 38 ) or magnetic plate assembly 4, coil 3 and connecting plate 53 ( Figure 37 The overall relative shell assembly 1, which is composed of the ) vibrates.

[0146] It is understandable that when the coil 3 and the magnetic plate assembly 4 are fixed relative to each other, the distance between the coil 3 and the magnetic plate 40 remains constant. It is not easy for the polarization of the magnetic plate 40 to be affected by the change in the distance between the two, which is beneficial to improving the acoustic performance.

[0147] Optionally, when coil 3 is connected to permanent magnet circuit system 2, there is a gap between it and connecting piece 52 or connecting plate 53. This gap not only prevents collision between coil 3 and permanent magnet circuit system 2 or connecting piece 52 / connecting plate 53 during vibration, but also increases the length of the suspended portion 501 of spring piece 50, improving low-frequency acoustic performance.

[0148] Some embodiments of this utility model also propose an electronic device, which includes the bone conduction vibrator described above. The electronic device can be, for example, a wearable electronic device such as headphones, hearing aids, smart glasses, or a smart helmet, but is not limited to wearable electronic devices; it can also be, for example, a mobile phone.

[0149] It should be noted that, in the absence of conflict, the various embodiments described herein can be combined with each other to obtain more implementation schemes.

[0150] The above are merely specific embodiments of this utility model. Any improvements made based on the concept of this utility model shall be considered within the scope of protection of this utility model.

Claims

1. A bone conduction oscillator, characterized in that, include: The housing assembly (1) is made of a magnetically conductive material; A permanent magnet circuit system (2) is provided inside the outer shell assembly (1). The permanent magnet circuit system (2) includes an iron edge assembly (22) and two sets of magnet assemblies (21). The magnet assemblies (21) form a magnetic circuit through the iron edge assembly (22). Each set of magnet assemblies (21) includes two magnets (210) with opposite poles. The magnetization directions of the magnets (210) in the two sets of magnet assemblies (21) are the same. The two magnetic poles of the magnets (210) are arranged along the vibration direction of the bone conduction oscillator. Two coils (3) are disposed inside the housing assembly (1), and the two coils (3) are respectively located on both sides of the permanent magnet circuit system (2). The magnetic fields generated by the two coils (3) at the same time are in opposite directions. A magnetic guide plate assembly (4) is inserted into the two coils (3) and located between the two magnets (210) of the magnet assembly (21). Magnetic conduction is achieved at both ends of the magnetic guide plate assembly (4) through the portion between the two ends; and... The reset assembly (5), connected between the magnetic plate assembly (4) and the permanent magnet circuit system (2), includes a spring piece (50) for providing elastic force.

2. The bone conduction oscillator as described in claim 1, characterized in that, The magnetic plate assembly (4) includes a magnetic plate (40) with both ends extending beyond the two coils (3).

3. The bone conduction oscillator as described in claim 1, characterized in that, The magnetic plate assembly (4) includes two magnetic plates (40) arranged along the length of the magnetic plate assembly (4), with adjacent ends of the two magnetic plates (40) magnetically connected, and both ends of the entire assembly of the magnetic plates (40) extending beyond the two coils (3).

4. The bone conduction oscillator as described in claim 3, characterized in that, The adjacent ends of the two magnetic plates (40) are in direct contact.

5. The bone conduction oscillator as described in claim 3, characterized in that, All of the magnetic plates (40) have their two surfaces flush in the vibration direction.

6. The bone conduction oscillator as described in claim 3, characterized in that, The magnetic plate assembly (4) includes two outer frame bodies (41) respectively connected to the two magnetic plates (40). The outer frame body (41) includes a middle part (410) and side arms (411) connected to both ends of the middle part (410). The two side arms (411) extend in the same direction. The magnetic plate (40) is connected to the middle part (410) and located between the two side arms (411). The outer shell assembly (1) includes a first shell (10) and a second shell (11). The outer frame body (41) is sandwiched between the first shell (10) and the second shell (11). The outer frame body (41) is integrally formed with the magnetic plate (40).

7. The bone conduction oscillator as described in any one of claims 2 to 6, characterized in that, The magnetic plate assembly (4) further includes a pad (44) disposed on the surface of the magnetic plate (40), the pad (44) being at least partially located between the magnetic plate (40) and the magnet (210), the pad (44) being made of a non-magnetic material and having a hardness less than that of the magnetic plate (4).

8. The bone conduction oscillator according to any one of claims 1 to 5, characterized in that, The magnetic guide plate assembly (4) is fixed relative to the outer shell assembly (1), or the permanent magnet circuit system (2) is fixed relative to the outer shell assembly (1).

9. The bone conduction oscillator according to any one of claims 1 to 6, characterized in that, Two sets of the magnet assemblies (21) are spaced apart along the length of the magnetic guide plate assembly (4). The two magnets (210) of each set of magnet assemblies (21) are located on both sides of the thickness direction of the magnetic guide plate assembly (4). The thickness direction of the magnetic guide plate assembly (4) is consistent with the vibration direction of the bone conduction vibrator.

10. The bone conduction oscillator according to any one of claims 1 to 6, characterized in that, The edge iron assembly (22) is provided with a channel (221) that runs through the length of the magnetic plate assembly (4), and the two magnets (210) of each set of magnet assemblies (21) are connected to the inner surface of the edge iron assembly (22).

11. The bone conduction oscillator according to any one of claims 1 to 6, characterized in that, The coil (3) is connected to the outer side of the permanent magnet circuit system (2) and is fixed relative to the permanent magnet circuit system (2); or, the coil (3) is connected to the reset component (5) and is fixed relative to the magnetic plate component (4).

12. The bone conduction oscillator according to any one of claims 1 to 6, characterized in that, The two ends of the magnetic plate assembly (4) extend beyond the two ends of the two coils (3), the two ends of the reset assembly (5) are respectively connected to the two ends of the magnetic plate assembly (4), and the middle part is connected to the permanent magnet circuit system (2).

13. An electronic device, characterized in that, Includes the bone conductor as described in any one of claims 1 to 12.

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