A vibrator of a bone conduction speaker and a bone conduction speaker

Abstract

The application provides a vibrator of a bone conduction loudspeaker, comprising: a vibrator main body, which converts electric energy into vibration kinetic energy and transmits the vibration to a vibration transmission part and a first elastic sheet; the vibration transmission part is arranged on one side of the vibrator main body close to a vibrating part, and the projection of the vibration transmission part on a reference surface is located at the geometric center of the projection of the vibrator main body on the reference surface; the first elastic sheet is a hollow sheet structure, arranged on one side of the vibrator main body close to the vibrating part, and the first elastic sheet is in contact with the vibration transmission part; the first elastic sheet comprises a first connecting part and a second connecting part, the first connecting part is connected with the vibrator main body; the projection contour of the second connecting part on the reference surface does not overlap with the projection contour of the vibrator main body on the reference surface, and the second connecting part is connected with a support connecting part. The application solves the technical problems of low vibration transmission efficiency and poor overall stability of the vibrator, and achieves the technical effect of improving user experience.

Description

Technical Field

[0001] This application relates to the field of bone conduction headphone technology, and more particularly to a vibrator and a bone conduction speaker for a bone conduction loudspeaker. Background Technology

[0002] Bone conduction headphones transmit sound through bone vibrations. Unlike traditional air conduction headphones, bone conduction headphones do not directly contact the ear canal. Instead, they transmit sound signals to the inner ear through the cheekbone or skull. Therefore, users can hear ambient sounds while wearing them, avoiding ear canal stuffiness or discomfort. Current bone conduction headphones typically use a design where the edge of the vibrator rests against a vibrating element, allowing the vibrator to transmit vibrations to the user's skin. However, this design results in low efficiency in transmitting vibrations from the vibrator to the vibrating element; that is, the volume perceived by the user is lower for the same vibration amplitude, affecting the user experience. Furthermore, in current technology, the vibrator spring is only connected to the vibrator body, leading to poor overall stability of the vibrator. Utility Model Content

[0003] This application provides a vibrator for a bone conduction loudspeaker and a bone conduction loudspeaker to improve the technical problem of low efficiency in transmitting vibrations from the vibrator to the vibrator when the edge of the vibrator is abutted against the vibrating element.

[0004] For the purposes mentioned above, this application provides the following technical solution: The first aspect of this application provides a vibrator for a bone conduction loudspeaker, comprising: The oscillator body converts electrical energy into vibrational kinetic energy and transmits the vibration to the vibration transmission part and the first spring plate; The vibration transmission part is disposed on the side of the oscillator body close to the vibrating element, and the projection of the vibration transmission part on the reference plane is located at the geometric center of the projection of the oscillator body on the reference plane. The first spring sheet is a hollow sheet structure and is disposed on the side of the oscillator body close to the vibrating element. The first spring sheet is in contact with the vibration transmission part. The first spring includes: a first connecting portion, the projection profile of the first connecting portion on the reference surface is the same as the projection profile of the oscillator body on the reference surface, and the first connecting portion is connected to the oscillator body; and a second connecting portion, the projection profile of the second connecting portion on the reference surface does not overlap with the projection profile of the oscillator body on the reference surface, and the second connecting portion is connected to the support connector. The vibrating element is located on the side of the bone conduction speaker closer to the user, and is used to transmit the vibration generated by the vibrator to the user's skin. A first contact surface is formed between the vibration transmission part and the vibrating element. The reference surface is a plane perpendicular to a first direction, which is the vibration direction of the vibrator. The supporting connector is connected to the vibrating element and is used to fix the vibrating element to the bone conduction speaker.

[0005] Furthermore, the vibration transmission part is a columnar structure, with the first radial end of the columnar structure connected to the center of the vibrator body on the side close to the vibrating element, and the second radial end of the columnar structure connected to the geometric center of the projection of the vibrating element onto the reference plane. The vibration transmission part is integrally formed with the vibrator body, the support connector is used to isolate the housing from the vibrator, and the housing is used to support and accommodate the internal components of the bone conduction speaker; the first connecting part of the first spring is connected to both the center and the edge of the vibrator body.

[0006] Furthermore, the columnar structure includes a cylindrical structure.

[0007] Furthermore, the projection of the second connecting part onto the reference plane is a symmetrical structure, and the axis of symmetry of the symmetrical structure passes through the geometric center of the projection of the vibration transmission part onto the reference plane.

[0008] Furthermore, the first connecting portion of the first spring has a hollow pattern parallel to the extending direction of the second connecting portion.

[0009] Furthermore, the second connecting part has a connecting through hole, through which a portion of the structure of the supporting connector passes, and a second contact surface is formed between the second connecting part and the supporting connector.

[0010] Furthermore, adhesive is applied to the first contact surface and / or the second contact surface.

[0011] Furthermore, the first connecting portion is connected to the oscillator body at the center and at the edge, respectively.

[0012] Furthermore, the vibrator of the bone conduction loudspeaker also includes: The second spring sheet is a hollow sheet structure and is located on the side of the oscillator body away from the vibrating component.

[0013] A second aspect of this application provides a bone conduction loudspeaker, comprising: A vibrator having the structure of a bone conduction loudspeaker vibrator as described in any of the first aspects; A vibrating element that transmits the vibration generated by the oscillator to the user's skin; the vibrating element is connected to a support connector and does not contact the housing. A housing for supporting and accommodating the internal components of a bone conduction loudspeaker; A support connector is provided, which is connected to the vibrator, the housing, and the vibrating element. The support connector is used to isolate the housing from the vibrating element.

[0014] This application designs a vibrator for a bone conduction loudspeaker, comprising: a vibrator body that converts electrical energy into vibrational kinetic energy and transmits the vibration to a vibration transmission part and a first spring; a vibration transmission part disposed on the side of the vibrator body near the vibrating element, with the projection of the vibration transmission part onto a reference plane located at the geometric center of the projection of the vibrator body onto the reference plane; and a first spring, which is a hollow sheet structure disposed on the side of the vibrator body near the vibrating element and contacts the vibration transmission part. This design solves the technical problems of low vibration transmission efficiency when the vibrator edge is pressed against the vibrating element and poor overall stability of the vibrator due to the spring only being connected to the vibrator body, thus improving the user experience. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the bone conduction headphones described in this application; Figure 2A This is a schematic diagram showing one direction of the bone conduction loudspeaker of this application; Figure 2B This is a schematic diagram showing another direction of the bone conduction loudspeaker of this application; Figure 2C This is an exploded schematic diagram of the bone conduction loudspeaker of this application; Figure 3 This is an exploded view of the housing, vibrating component, and supporting connector of this application; Figure 4A This is a schematic diagram showing the direction of the oscillator of this application toward the vibrating component; Figure 4B This is a schematic diagram showing the direction in which the oscillator of this application is away from the vibrating element; Figure 5A This is a schematic diagram of the oscillator body and a vibration transmission part of the oscillator of this application; Figure 5B This is a schematic diagram of the first spring fragment described in this application; Figure 5C This is a schematic diagram of another vibration transmission part of the oscillator in this application; Figure 6A This is a schematic diagram showing the connection between the oscillator and the vibrating component in this application; Figure 6B This is a schematic diagram showing the connection between the oscillator and the support connector in this application; Figure 7 This is a schematic diagram of a single-degree-of-freedom viscous damping vibration isolation system.

[0017] Reference numerals: 100-Bone conduction speaker; 110-Housing; 130-Vibrating element; 150-Microphone; 120-Vibrator; 121-Vibration transmission part; 122-Vibrator body; 123-First spring; 124-Second spring; 1211-First end; 1212-Second end; 1221-First boss; 1222-Second boss; 1231-First connecting part; 1232-Second connecting part; 1233-Connecting through hole; 1234-Weld hole; 140-Supporting connector; 1401-Protruding structure; 200-Bone conduction earphone; 210-Fixing device; 220-Circuit assembly; 320-Reference surface; 400-First contact surface; X-First direction. Detailed Implementation

[0018] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Furthermore, terms such as "horizontal" and "vertical" do not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Similarly, terms such as "front," "back," "left," and "right" do not imply that the component must be absolutely front, back, left, or right, but can be slightly tilted.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, the bone conduction headphones 200 include two bone conduction speakers 100, a fixing device 210, and a circuit assembly 220. The fixing device 210 is made of a flexible material and, when the user is wearing the bone conduction headphones 200 normally, is located behind the user's head, its clamping force used to clamp the left and right bone conduction speakers 100 against the user's left and right cheekbones. The circuit assembly 220 includes a circuit system and a battery for powering the bone conduction speakers 100. Figure 2C and Figure 3 As shown, the bone conduction loudspeaker 100 includes a housing 110, an oscillator 120, a vibrating element 130, a support connector 140, and a microphone 150. Figures 2A to 2C The bone conduction speaker 100 shown is located on the right side of the user in the normal wearing state. The structure of the bone conduction speaker 100 on the left side is similar to that of the bone conduction speaker 100 on the right side. The microphone 150 can be set in either of the two bone conduction speakers 100 as needed.

[0024] Figures 4A-4B This is a schematic diagram of the transducer 120 of the bone conduction loudspeaker of this application from different angles. The transducer 120 described in this application includes a transducer body 122, a vibration conduction part 121, and a first spring 123. The transducer body 122 is the core of the transducer 120. The transducer body 122 converts electrical energy into vibrational kinetic energy, that is, it converts the changing current signal into a vibration signal through the principle of electromagnetic field, and transmits the vibration to the vibration conduction part 121 and the first spring 123.

[0025] The vibration transmission part 121 is disposed on the side of the oscillator body 122 close to the vibrating member 130, and the projection of the vibration transmission part 121 on the reference surface 320 is located at the geometric center of the projection of the oscillator body 122 on the reference surface 320. Figure 5A This is a schematic diagram of one structure of the oscillator body 122 and the vibration transmission part 121. For simplicity, the diagram omits structures such as coils and magnets, focusing instead on the positional relationship between the oscillator body 122 and the vibration transmission part 121. As shown, the vibration transmission part 121 can be a cylinder located at the center of the oscillator body 122. It is easy to understand that the shape of the vibration transmission part 121 can also be other options, for example... Figure 5C The prism or other suitable geometric shape shown, or even an irregular geometric shape as needed, can be used as the vibration transmission part 121, or multiple regular columnar structures can be used as the vibration transmission part 121, as long as the vibration of the oscillator body 122 is transmitted to the vibrating element 130. A first boss 1221 is also provided at the center of the oscillator body 122 for fixing the vibration transmission part 121. For example... Figure 2B and Figure 3 As shown, the vibrating element 130 is located on the side of the bone conduction speaker closer to the user, and is used to transmit the vibration generated by the vibrator 120 to the user's skin. When the bone conduction headphones are correctly worn on the user's facial skin, the vibrator 120 vibrates in a direction perpendicular to the skin surface. In this application, the vibration direction of the vibrator 120 is defined as the first direction X, and the surface perpendicular to the first direction X is defined as the reference surface 320.

[0026] Normally, the amplitude of vibration is largest and the energy is most concentrated at the geometric center of the projection of the oscillator body 122 on the reference plane 320. Therefore, placing the vibration transmission part 121 at the center of the side of the oscillator body 122 close to the vibrating element 130 can concentrate the vibration of the oscillator body 122 to the vibrating element 130, preventing unnecessary energy loss during the transmission of vibration from the oscillator 120 to the vibrating element 130.

[0027] When the vibration transmission part 121 is a columnar structure, the first radial end 1211 of the columnar structure is connected to the center of the side of the oscillator body 122 near the vibrating element 130, and the second radial end 1212 of the columnar structure is connected to the geometric center of the projection of the vibrating element 130 on the reference plane 320; wherein, the vibration transmission part 121 and the oscillator body 122 are integrally formed.

[0028] The columnar structures here include regular shapes such as cylinders and prisms. Using a single, regular shape for the vibration transmission part 121 can reduce production and processing costs, for example... Figure 5ACompared to multi-column structures, a single columnar structure is easier to manufacture and process, and the connection structure between the vibration transmission part 121 and the vibrating element 130 is simpler to design, making it easier to achieve a tight connection between the vibrating element 130 and the vibration transmission part 121. The design method of integrally molding the vibration transmission part 121 and the oscillator body 122 ensures the stability of the connection between the vibration transmission part 121 and the oscillator body 122, preventing the vibration transmission part 121 from detaching from the oscillator body 122. Figure 6A As shown, by connecting the vibration transmission part 121 to the center of the vibrating element 130, the technical problem of low vibration transmission efficiency when the edge of the vibrator abuts against the vibrating element is solved, thus improving the user experience. Furthermore, this application ensures that the vibration of each area of ​​the surface of the vibrating element 130 in contact with the user's skin is relatively uniform, preventing the user's skin from experiencing uncomfortable numbness or itching due to uneven vibration. Preferably, the diameter of the cylinder of the vibration transmission part 121 is between 1.2mm and 2.2mm. If the diameter of the vibration transmission part 121 is too large, it will increase the difficulty and cost of tightly connecting the vibration transmission part 121 and the vibrating element 130; if the diameter is too small, the vibration transmission part 121 will be subjected to excessive pressure and easily damaged. The length of the cylinder of the vibration transmission part 121 is more suitable between 2mm and 4mm. If the length is too long, it will occupy too much internal space of the bone conduction speaker, resulting in an excessively large and non-compact structure; if the length is too small, it will make the connection between the vibration transmission part 121 and the vibrating element 130 difficult, and the corresponding design structure of the vibrating element 130 will become more complex.

[0029] Preferably, the columnar structure is a cylindrical structure. For example... Figure 4A and Figure 6A As shown, the surface of the vibration transmission part 121 of the cylinder is more rounded and has fewer sharp edges, which prevents the vibration transmission part 121 from being subjected to excessive local force during the collision with the vibrating element 130 and damaging the oscillator 120 or the vibrating element 130.

[0030] The oscillator 120 described in this application further includes a first spring plate 123. The first spring plate 123 has a hollow sheet-like structure and is disposed on the side of the oscillator body 122 near the vibrating element 130. The first spring plate 123 is in contact with the vibration transmission part 121. Figure 4A As shown, the first spring 123 is disposed on the same side of the oscillator body 122 and the vibration transmission part 121, and the first spring 123 is in contact with both the oscillator body 122 and the vibration transmission part 121. By providing the first spring 123, it not only protects the internal structure of the oscillator body 122 and prevents the internal coils or magnets of the oscillator body 122 from shifting or being damaged during vibration, but also makes the vibration of the oscillator body 122 more uniform and stable to be transmitted to the vibrating element 130.

[0031] The first spring piece 123 may include a first connecting portion 1231 and a second connecting portion 1232. The projected outline of the first connecting portion 1231 on the reference surface 320 is the same as the projected outline of the oscillator body 122 on the reference surface 320. Here, the projected outline refers to the outer outline of the projection, excluding the internal hollow pattern generated by the projection of the first connecting portion 1231 on the reference surface 320. Figure 4A , Figure 5B As shown, in this application, the projections of the first connecting part 1231 and the oscillator body 122 are both circular outlines, and the first connecting part 1231 is connected to the oscillator body 122.

[0032] The projection outline of the second connecting part 1232 on the reference plane 320 does not overlap with the projection outline of the oscillator body 122 on the reference plane 320, such as Figure 4A , Figure 5B As shown, the second connecting portion 1232 described in this application has an ear-shaped structure, extending from the first connecting portion 1231 in a direction away from the vibration transmission portion 121. The second connecting portion 1232 is connected to the support connector 140, as shown... Figure 3 , Figure 6B As shown, the second connecting portion 1232 of this application is connected to the protruding structure 1401 on the support connector 140, thereby limiting the first spring 123 through the support connector 140, and thus limiting the vibrator 120. When the support connector 140 is made of silicone or other materials with low vibration conductivity, the support connector 140 itself acts as a vibration isolation device. The design of connecting the second connecting portion 1232 of the first spring 123 to the support connector 140 can transmit excess vibration at the edge of the first spring 123 to the silicone or other materials, where the support connector 140 absorbs the excess vibration, preventing it from being transmitted to other parts of the bone conduction speaker and causing sound leakage. Figure 2C and Figure 3 As shown, the support connector 140 is connected to the vibrating element 130 and is used to fix the vibrating element 130 to the bone conduction speaker.

[0033] Optionally, the projection of the second connecting portion 1232 onto the reference plane 320 is a symmetrical structure, and the axis of symmetry of the symmetrical structure passes through the geometric center of the projection of the vibration transmission portion 121 onto the reference plane 320. For example... Figure 5B As shown in the specific embodiment of this application, the first spring 123 has a symmetrical structure with axes of symmetry A1 and A2, where both A1 and A2 pass through the geometric center of the first spring 123. Correspondingly, Figure 5BThe second connecting portion 1232 of the first spring 123 shown is also a symmetrical structure. The symmetrical structure design ensures that when the first spring 123 vibrates, the force on each part of the second connecting portion 1232 is relatively uniform, preventing excessive local force from damaging the first spring 123, or uneven force from causing uneven vibration transmitted to the vibrating element 130, thus reducing the user experience.

[0034] Optionally, the first connecting portion 1231 of the first spring piece 123 has a hollow pattern parallel to the extending direction of the second connecting portion 1232. For example... Figure 5B As shown, the second connecting portion 1232 extends along the A2 direction, and correspondingly, the hollow pattern on the first connecting portion 1231 is a rounded rectangle extending along the A2 direction. Due to the presence of the second connecting portion 1232, the span of the first spring piece 123 along the A2 direction is much larger than its span along the A1 direction. Therefore, the deformation of the first spring piece 123 along the A2 direction is greater than its deformation along the A1 direction. The hollow pattern parallel to the A2 direction makes the deformation of the first spring piece 123 along the A2 direction more flexible, thus increasing its durability and making it less prone to damage. Since the bone conduction headphones described in this application are primarily used in the field of hearing aids, hearing-impaired users typically wear the headphones for longer periods, requiring a larger vibration amplitude from the vibrator 120. Therefore, the durability and stability of the headphones are even more important.

[0035] Optionally, the second connecting portion 1232 is provided with a connecting through hole 1233, through which a portion of the structure supporting the connecting member 140 passes. For example... Figure 5B , Figure 6B As shown, the ear-shaped structure of the second connecting part 1232 is provided with a connecting through hole 1233. The connecting through hole 1233 matches the protruding structure 1401 on the supporting connector 140. Specifically, the protruding structure 1401 passes through the connecting through hole 1233. Normally, the vibration direction of the vibrator 120 is perpendicular to the reference surface 320. However, during user wear, due to the tilt of the bone conduction speaker and the effect of gravity, the vibrator 120 may also have a slight displacement along the direction of the reference surface 320. By having part of the structure of the supporting connector 140 pass through the connecting through hole 1233, the supporting connector 140 can not only limit the excessive displacement of the first spring 123 along the X-axis, but also limit the slight displacement along the direction of the reference surface 320. At the same time, the design of matching the protruding structure 1401 with the connecting through hole 1233 also makes the assembly of the vibrator 120 and the supporting connector 140 more convenient and precise. Figure 5BAs shown, preferably, the span of the second connecting portion 1232 along the A1 direction is smaller than the span of the first connecting portion 1231 along the A1 direction. If the span of the second connecting portion 1232 along the A1 direction is too large, it is easy for the second connecting portion 1232 to excessively restrict the vibration of the first spring 123, affecting the vibration amplitude of the oscillator 120. When the span of the second connecting portion 1232 along the A1 direction is between 1 / 3 and 2 / 3 of the span of the first connecting portion 1231 along the A1 direction, the overall performance of the second connecting portion 1232 is better. Preferably, the length of the connecting through hole 1233 of the second connecting part 1232 along the A1 direction is greater than three times the diameter of the vibration transmission part 121. This is because the diameter of the vibration transmission part 121 is smaller, which is conducive to the vibrator 120 transmitting the vibration to the vibrating member 130 more concentratedly, and it is easier to achieve a tight connection between the vibrating member 130 and the vibrator 120. On the other hand, the longer length of the connecting through hole 1233 along the A1 direction can fully transmit excess vibration to the supporting connector 140, thereby achieving a better sound leakage prevention effect.

[0036] like Figure 6A As shown, a first contact surface 400 is formed between the vibration transmission part 121 and the vibrating element 130. Similarly, as... Figure 6B As shown, a second contact surface is formed between the second connecting portion 1232 and the supporting connector 140. Applying adhesive to the first contact surface 400 improves the connection performance between the vibrator 120 and the vibrating member 130, making the connection between the vibrator 120 and the vibrating member 130 tighter, thereby improving vibration transmission efficiency, that is, the user perceives a higher volume with the same vibration amplitude of the vibrator 120. Applying adhesive to the second contact surface makes the connection between the vibrator 120 and the supporting connector 140 more stable, further preventing the vibrator 120 from shaking inside the bone conduction speaker and generating noise.

[0037] like Figure 4A , 5A as well as Figure 5BAs shown, the first connecting part 1231 is connected to the oscillator body 122 at both the center and the edge. At the center of the first connecting part 1231, the center of the first spring piece 123 is welded to the first boss 1221 at the center of the oscillator body 122 via multiple welding holes 1234. A second boss 1222 is also provided at the edge of the oscillator body 122, and the edge of the first connecting part 1231 is fixed to the second boss 1222 by welding or adhesive. By connecting the first connecting part 1231 to the oscillator body 122 at both the center and the edge, the stability of the connection is ensured. Furthermore, by fully utilizing the hollow structure of the first spring piece 123, which allows for easy deformation when the amplitude is greater at the center than at the edge of the oscillator body 122, the overall stability and durability of the oscillator 120 structure are guaranteed. The first protrusion 1221 and the second protrusion 1222 create a certain gap between the installed first spring 123 and the vibrator body 122. This gap prevents unnecessary interference and wear between the vibrator body 122 and the first spring 123, increasing the durability of the vibrator body 122. Simultaneously, since the first connecting portion 1231 of the first spring 123 is connected to both the center and edge of the vibrator body 122, most of the vibration generated by the vibrator body 122 is transmitted to the vibrating element 130 through the first connecting portion 1231 and the vibration transmission portion 121. Only a small amount of excess vibration is transmitted to the supporting connector 140 through the second connecting portion 1232, further improving vibration transmission efficiency while preventing sound leakage.

[0038] Optionally, the oscillator 120 further includes a second spring sheet 124, which is a hollow sheet structure and is disposed on the side of the oscillator body 122 away from the vibrating element. Figure 4B As shown, the projection shape of the second spring 124 on the reference surface 320 is approximately the same as the projection shape of the first connecting portion 1231 of the first spring 123 on the reference surface 320. The connection method between the second spring 124 and the vibrator body 122 can be set to be the same as the connection method between the first connecting portion 1231 and the vibrator body 122. The hollow pattern on the second spring 124 is the same as or similar to the hollow pattern on the first spring 123, thereby causing the second spring 124 to vibrate in the opposite direction to the first spring 123, achieving the technical effect of preventing sound leakage from the bone conduction headphones. By setting the second spring 124, the force on the first spring 123 can be shared, avoiding excessive deformation of the first spring 123 that leads to tone deviation, further improving the stability and reliability of the first spring 123 and even the vibrator 120. Since the bone conduction headphones described in this application are primarily used in the field of hearing aids, hearing-impaired users usually wear headphones for longer periods of time, and the vibration amplitude required by the vibrator 120 is greater. Therefore, the durability and stability of the headphones are even more important.

[0039] Preferably, the vibration transmission part 121 described in this application is a cylinder with a diameter in the range of 1.5mm-3mm. In order to explain the principle of selecting a suitable diameter for the vibration transmission part 121 with a cylindrical structure, the following argument is made: For ease of calculation, the vibration transmission part 121 of this application is geometrically abstracted, and it is abstracted into a cross-sectional diameter of... d cm, height is 3mm, volume is The cylindrical shape, made of steel, has a density of 7.85 g / cm³. 3 Therefore, the mass of the vibration transmission part It should be noted that the dimensions and data of the cylinder given here are not entirely equivalent to the vibration transmission part 121 in this application.

[0040] The human ear is sensitive to sound frequencies of approximately ,Right now The damping ratio of steel is approximately The Young's modulus is approximately 200 GPa. The stiffness is calculated using the stiffness calculation formula. The natural frequency of the aforementioned vibration transmission part is... The frequency ratio is .

[0041] The aforementioned vibration transmission part can be abstracted as follows: Figure 7 The single-degree-of-freedom viscous damping vibration isolation system is shown, and the vibration transmissibility Tr is obtained according to the vibration transmissibility formula:

[0042] According to the above It is known that the diameter d of the vibration transmission part 121 has a negligible effect on the vibration conductivity. Therefore, using a smaller diameter vibration transmission part 121 saves material and makes it easier to achieve a tight connection between the vibration transmission part 121 and the vibrating element 130, resulting in better vibration transmission, more concentrated and delicate vibration, and reducing the uncomfortable tingling sensation for the user. At the same time, if the diameter of the vibration transmission part 121 is too small, it may cause excessive local stress on the vibrating element 130, making it prone to damage.

[0043] like Figure 2C and Figure 3As shown, the bone conduction speaker 100 also includes a housing 110, which may be made of rigid plastic, for supporting and accommodating the internal components of the bone conduction speaker 100. A support connector 140 is connected to the vibrator 120, the housing 110, and the vibrating element 130. The support connector 140 isolates the housing 110 from the vibrating element 130, preventing the housing 110 from contacting the vibrating element 130. Because the support connector 140 and the vibrating element 130 are made of different materials—for example, the support connector 140 and the vibrating element 130 are made of silicone and zirconium oxide respectively—silicone material has good vibration damping and sound insulation effects, thus isolating the vibration of the vibrating element 130 from the housing 110. Conventional bone conduction headphones, because they use the housing directly as the vibrating element or the housing is directly connected to the vibrating element, the vibration of the vibrator is transmitted to the vibrating element and then back to the housing. The vibration of the housing consumes a large amount of energy and causes vibration of the surrounding air, resulting in sound leakage. This application achieves the technical effect of preventing sound leakage by using a support connector 140, an isolation housing 110, and a vibrating element 130.

[0044] like Figure 6A As shown, the vibration transmission part 121 and the vibrating element 130 of the bone conduction speaker of this application are connected by a surround plug-in method, which transmits the vibration generated by the vibrator 120 to the vibrating element 130 to the maximum extent. Because of the surround plug-in connection, even if the vibrator 120 generates a small disturbance perpendicular to the X direction, the vibration transmission part 121 and the vibrating element 130 can still be stably connected, preventing the connection between the vibrator 120 and the vibrating element 130 of the bone conduction speaker from becoming loose after long-term use. Since the bone conduction headphones described in this application are primarily used in the field of hearing aids, hearing-impaired users usually wear headphones for longer periods of time, and the vibration amplitude required for the vibrator 120 is greater. Therefore, the durability and stability of the headphones are even more important.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A vibrator for a bone conduction loudspeaker, characterized in that, include: The oscillator body (122) converts electrical energy into vibrational kinetic energy and transmits the vibration to the vibration transmission part (121) and the first spring piece (123). Vibration transmission part (121) is provided on the side of the oscillator body (122) close to the vibrating element (130), and the projection of the vibration transmission part (121) on the reference plane (320) is located at the geometric center of the projection of the oscillator body (122) on the reference plane (320); The first spring piece (123) is a hollow sheet structure and is disposed on the side of the oscillator body (122) close to the vibrating element (130). The first spring piece (123) is in contact with the vibration transmission part (121). The first spring piece (123) includes: a first connecting part (1231), the projection outline of the first connecting part (1231) on the reference surface (320) is the same as the projection outline of the oscillator body (122) on the reference surface (320), and the first connecting part (1231) is connected to the oscillator body (122); and a second connecting part (1232), the projection outline of the second connecting part (1232) on the reference surface (320) does not overlap with the projection outline of the oscillator body (122) on the reference surface (320), and the second connecting part (1232) is connected to the support connector (140); The vibrating element (130) is located on the side of the bone conduction speaker closer to the user and is used to transmit the vibration generated by the vibrator (120) to the user's skin. The vibration transmission part (121) and the vibrating element (130) form a first contact surface. The reference surface (320) is a plane perpendicular to the first direction (X), which is the vibration direction of the vibrator (120). The supporting connector (140) is connected to the vibrating element (130) and is used to fix the vibrating element (130) on the bone conduction speaker.

2. The vibrator of the bone conduction loudspeaker according to claim 1, characterized in that, The vibration transmission part (121) is a columnar structure. The first radial end (1211) of the columnar structure is connected to the center of the vibrator body (122) on the side close to the vibrating element (130). The second radial end (1212) of the columnar structure is connected to the geometric center of the projection of the vibrating element (130) on the reference plane (320). The vibration transmission part (121) is integrally formed with the vibrator body (122), the support connector (140) is used to isolate the housing (110) from the vibrator (130), the housing (110) is used to support and accommodate the internal components of the bone conduction speaker; the first connecting part (1231) of the first spring (123) is connected to the center and edge of the vibrator body (122).

3. The vibrator of the bone conduction loudspeaker according to claim 2, characterized in that, The columnar structure includes a cylindrical structure.

4. The vibrator of the bone conduction loudspeaker according to claim 1, characterized in that, The projection of the second connecting part (1232) onto the reference plane (320) is a symmetrical structure, and the axis of symmetry of the symmetrical structure passes through the geometric center of the projection of the vibration transmission part (121) onto the reference plane (320).

5. The vibrator of the bone conduction loudspeaker according to claim 4, characterized in that, The first connecting portion (1231) of the first spring piece (123) has a hollow pattern parallel to the extending direction of the second connecting portion (1232).

6. The vibrator of the bone conduction loudspeaker according to claim 5, characterized in that, The second connecting part (1232) has a connecting through hole (1233), a portion of the structure of the support connector (140) passes through the connecting through hole (1233), and a second contact surface is formed between the second connecting part (1232) and the support connector (140).

7. The vibrator of the bone conduction loudspeaker according to claim 6, characterized in that, Adhesive is applied to the first contact surface and / or the second contact surface.

8. The vibrator of the bone conduction loudspeaker according to claim 4, characterized in that, The first connecting part (1231) is connected to the oscillator body (122) at the center and at the edge respectively.

9. The vibrator of the bone conduction loudspeaker according to claim 1, characterized in that, Also includes: The second spring (124) is a hollow sheet structure and is located on the side of the vibrator body (122) away from the vibrating element.

10. A bone conduction loudspeaker, characterized in that, include: A vibrator (120) having the structure of a bone conduction loudspeaker as described in any one of claims 1-9; A vibrating element (130) transmits the vibration generated by the vibrator (120) to the user's skin. The vibrating element (130) is connected to the support connector (140) and does not contact the housing (110). A housing (110) for supporting and accommodating the internal components of a bone conduction loudspeaker; A support connector (140) is connected to the vibrator (120), the housing (110) and the vibrating element (130). The support connector (140) is used to isolate the housing (110) from the vibrating element (130).

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