Vibration piece of bone conduction speaker and bone conduction speaker
Patent Information
- Application Number
- CN202522483125.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-24
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-11-24
AI Technical Summary
[0003]本申请提供了骨传导扬声器的振动件及骨传导扬声器，以改善振子产生的振动通过振子外围结构或振子整体结构传递至振动件时，振动传递效率较低以及长期振动的情况下容易导致振动件松动脱落的技术问题
[0014]本申请通过设计一种骨传导扬声器的振动件和相应的骨传导扬声器，解决了振子向振动件传递振动的位置较分散，振动传递过程中存在大量能量损耗，振动传递效率较低以及在长期振动的情况下容易导致振动件松动脱落的技术问题，达到了提高振动传递效率和振动件稳定性较差的技术效果。本申请的骨传导扬声器优选应用于助听器领域，对于听障用户而言，振动传递效率和骨传导扬声器的耐久性的提升对用户体验有明显的影响。
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Figure CN224923868U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bone conduction headphone technology, and more particularly to the vibrating element and bone conduction speaker of 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. Existing bone conduction headphones use a speaker (i.e., a bone conduction speaker) consisting of a shell that contacts the user's skin, a vibrating element, and a transducer. Vibrations generated by the transducer are transmitted to the vibrating component through its peripheral structure or the entire transducer structure. The vibrations transmitted from the transducer to the vibrating component are relatively dispersed. When both the vibrating component and the transducer are made of rigid materials, uneven surfaces caused by manufacturing errors result in poor bonding between the two materials due to the dispersed contact area. This leads to significant energy loss during vibration transmission and low transmission efficiency. Furthermore, the connections between the vibrating component and other components besides the transducer in existing technologies are relatively loose, making the vibrating component prone to loosening and detachment under prolonged vibration. Utility Model Content
[0003] This application provides a vibrating element and a bone conduction loudspeaker to improve the technical problems of low vibration transmission efficiency and easy loosening and detachment of the vibrating element under long-term vibration when the vibration generated by the oscillator is transmitted to the vibrating element through the oscillator's peripheral structure or the oscillator's overall structure.
[0004] For the purposes mentioned above, this application provides the following technical solution: The first aspect of this application provides a vibrating element for a bone conduction loudspeaker, comprising: The first connecting part 132 has a centroidal axis that coincides with the centroidal axis of the main body 133. The first connecting part is a hollow column, and the inner surface of the first connecting part is composed of an annular surface and a plane, which is used to surround and insert the vibration transmission column. The main body has an outer surface that contacts the user's skin and an inner surface that faces the vibrator body. The main body is integrally formed with the first connecting part. The second connecting part is integrally formed with the main body part, the second connecting part is connected to the support connecting member, and the second connecting part clamps the support connecting member along the direction of the centroidal axis; The vibration transmission column is directly connected to the oscillator body without any support structure between them. The vibration transmission column is used to directly transmit the vibration generated by the oscillator to the first connecting part. The centroidal axis is perpendicular to the inner surface of the main body. The supporting connector is made of a different material than the vibrating component, and the vibration transmission rate of the supporting connector is lower than that of the vibrating component.
[0005] Furthermore, the annular surface of the first connecting portion and / or the surface of the vibration transmission column that contacts the first connecting portion have a fastening structure to distribute the pressure on the plane of the first connecting portion.
[0006] Furthermore, the fastening structure includes adhesive.
[0007] Furthermore, the annular surface includes at least one of a cylindrical surface and a frustum surface.
[0008] Furthermore, the vibrating element of the bone conduction speaker is made of zirconium oxide.
[0009] Furthermore, the annular surface includes at least one of a cylindrical surface and a frustum surface.
[0010] Furthermore, the first connecting part is connected to the center of the spring piece through a vibration transmission column, and the spring piece is disposed on the surface of the oscillator body facing the vibration transmission column.
[0011] Furthermore, the length of the annular surface of the first connecting part is less than the length of the centroidal axis of the vibration transmission column, and there is redundant space between the first connecting part and the spring piece.
[0012] A second aspect of this application provides a bone conduction loudspeaker, comprising: An oscillator, comprising a vibration transmission column that transmits vibration to a vibrating element; A vibrating element having the structure of a bone conduction loudspeaker as described in the first aspect; The housing is connected to the support connector but does not contact the vibrating component; A support connector is used to connect the housing and the vibrating element.
[0013] Furthermore, the projected area of the vibrating element on the plane perpendicular to the vibration transmission column is smaller than the projected area of the oscillator body.
[0014] This application addresses the technical problems of dispersed vibration transmission from the vibrator to the vibrating element, significant energy loss during vibration transmission, low vibration transmission efficiency, and the tendency for the vibrating element to loosen and detach under long-term vibration by designing a vibrating element and a corresponding bone conduction speaker. It achieves the technical effect of improving vibration transmission efficiency and reducing the poor stability of the vibrating element. The bone conduction speaker of this application is preferably used in the field of hearing aids. For hearing-impaired users, the improved vibration transmission efficiency and durability of the bone conduction speaker have a significant impact on 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 vibrating component toward the oscillator in this application; Figure 4B This is a schematic diagram of the vibrating component of this application facing away from the oscillator direction; Figure 4C for Figure 4A A magnified view of a portion of region A; Figure 4D A schematic diagram of the annular surface of the vibration transmission column, which is composed only of a truncated platform. Figure 5A This is a schematic diagram of the oscillator in this application; Figure 5B This is a schematic diagram showing the connection between the oscillator and the vibrating component in this application; Figure 6 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; 140-Support connector; 150-Microphone; 160-Redundancy space; 120-Vibrator; 121-Vibration conduction column; 122-Vibrator body; 123-Spring; 130-Vibrating element; 131-Second connection; 132-First connection; 133-Main body; 1321-Annular surface; 1322-Plane; 1323-Columnar surface; 1324-Terraced surface; 200-Bone conduction earphone; 210-Fixing device; 220-Circuit assembly. 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] The vibrating element 130 of the bone conduction loudspeaker provided in this application is disposed on the side of the bone conduction loudspeaker 100 close to the user's skin, for transmitting the vibration of the vibrator 120 of the bone conduction loudspeaker to the user's facial skin, and then transmitting the sound signal to the inner ear through the cheekbone or skull. The material of the vibrating element 130 has higher rigidity than that of the supporting connector 140, and therefore has a higher vibration conductivity, such as... Figure 2B As shown, the vibrating element 130 protrudes towards the user's face relative to the supporting connector 140, thereby ensuring that vibration is transmitted by the vibrating element 130 rather than the supporting connector 140 in close contact with the user's face. The design of the vibrating element 130 being closer to the user's skin than the supporting connector 140 improves vibration transmission efficiency, reduces energy loss, and enhances the vibration transmission efficiency of the bone conduction headphones.
[0025] like Figure 5B As shown, the vibrator 120 and the vibrating element 130 of the bone conduction loudspeaker of this application are connected by a surround plug-in method, so as to transmit the vibration generated by the vibrator 120 to the vibrating element 130 to the greatest extent. Figure 4A , 4BAs shown, the vibrating element 130 of the bone conduction loudspeaker includes a first connecting portion 132 and a main body portion 133. Optionally, the vibrating element 130 may further include a second connecting portion 131 integrally formed with the main body portion 133. The second connecting portion 131 has a groove-like structure for connecting a support connecting element 140, and the second connecting portion 131 clamps the support connecting element 140 along the direction of the centroidal axis X. Figure 2C and Figure 3 As shown, the second connecting part 131 can accommodate the ring at the center of the support connector 140 in the groove structure, thereby forming a stable connection with the support connector 140. Since the vibration directions of the oscillator 120 and the vibrating member 130 are both along the X-axis, the design of using the second connecting part 131 to clamp the support connector 140 along the X-axis ensures that the vibrating member 130 can receive stable support from the support connector 140 whether it vibrates upwards or downwards along the X-axis. The vibrating member 130 described in this application is preferably made of zirconium oxide. Zirconia has a high density and is relatively heavy, and the double-sided clamping design makes the connection of the zirconium oxide vibrating member more stable. Because the vibration transmission rate of the support connector 140 is lower than that of the vibrating member 130, the support connector 140 can isolate the vibration of the vibrating member 130 from being transmitted to the housing 110. The design of the second connecting portion 131 clamping the support connector 140 along the X-axis ensures that the support connector 140 can fully exert its vibration damping and sound insulation function regardless of whether the vibrating member 130 vibrates upwards or downwards along the X-axis. The X-axis of the first connecting portion 132 coincides with the X-axis of the main body 133, and the X-axis is perpendicular to the inner surface of the main body 133. That is, when both the first connecting portion 132 and the main body 133 are regular geometric structures, such as cylinders, the first connecting portion 132 is located at the center of the vibrating member 130, combined with… Figure 5B As shown, the center of the vibrating element 130 corresponds to the center of the oscillator 120. The vibration at the center of the oscillator 120 is more concentrated and intense. By bringing the most intense vibration of the oscillator 120 into contact with the first connecting part 132, the transmission efficiency of vibration from the oscillator 120 to the vibrating element 130 is improved. Figure 4C As shown, the inner surface of the first connecting portion 132 is composed of an annular surface 1321 and a plane 1322, for surrounding the insertion of the vibration transmission column 121. The annular surface 1321 includes at least one of a columnar surface and a frustum surface. Figure 4C The annular surface 1321 shown includes a cylindrical surface 1323 and a truncated platform surface 1324. The truncated platform surface 1324 facilitates the insertion of the vibration transmission column 121 into the first connecting portion 132. The annular surface 1321 can also be configured to include only the cylindrical surface or only the truncated platform surface. Figure 4DAs shown, the annular surface 1321 of the first connecting portion 132 is composed only of a frustum-shaped surface 1324. Correspondingly, the vibration transmission column 121 adopts a frustum-shaped column structure corresponding to the frustum-shaped surface 1324. Compared to the annular surface 1321 being composed only of columnar surfaces, Figure 4D The technical solution increases the force-bearing area of the vibrating element 130, thereby improving its durability. For example... Figure 5A and 5B As shown, the oscillator 120 is provided with a vibration transmission column 121 that matches the first connecting part 132. The vibration transmission column 121 has a cylindrical structure, and correspondingly, the columnar surface 1323 of the first connecting part 132 is a cylindrical surface. The annular surface 1321 adopts a cylindrical and frustum-shaped design, making the contact surface between the first connecting part 132 of the oscillator 130 and the vibration transmission column 121 relatively smooth. Since zirconia is a brittle ceramic material, when the oscillator 130 is made of zirconia, the smooth annular surface 1321 can prevent the first connecting part 132 from being damaged due to excessive local stress. To further prevent excessive local stress on the non-smooth parts of the first connecting part 132, the plane 1322 of the inner surface of the first connecting part 132 can be designed as a spherical surface, if the manufacturing process allows, thereby eliminating the edge between the annular surface 1321 and the plane 1322. The diameter of the vibration conduction post 121 is slightly smaller than the diameter of the cylindrical surface 1323 of the first connecting portion 132, thereby allowing the vibration conduction post 121 to be tightly inserted into the first connecting portion 132. Because the first connecting portion 132 has an annular surface 1321, even when the vibrator 120 experiences minor disturbances perpendicular to the direction of the vibration conduction post 121, the vibration conduction post 121 and the first connecting portion 132 can still maintain a stable connection, preventing the connection between the vibrator 120 and the vibrating element 130 of the bone conduction speaker from becoming loose after prolonged use.
[0026] like Figure 4B As shown, the outer surface of the main body 133 is for contact with the user's skin. The dividing lines and intersecting lines at the center of the main body 133 in the figure are reference lines in the drawing process; these dividing lines and intersecting lines may not be present in the actual product. The main body 133, the first connecting part 132, and the second connecting part 131 are manufactured using an integral molding process, resulting in a more secure connection.
[0027] By designing the structure of the vibrating element 130 of the bone conduction speaker to better match the structure of the transducer 120, and by setting the first connecting part 132, the vibration signal is received at the center of the vibrating element 130. This solves the technical problems in the prior art where the vibration transmitted from the transducer to the vibrating element is relatively dispersed, there is a large amount of energy loss during vibration transmission, the vibration transmission efficiency is low, and the vibrating element is prone to loosening and falling off under long-term vibration. This achieves the technical effect of improving vibration transmission efficiency. The bone conduction speaker of this application is preferably used in the field of hearing aids. For hearing-impaired users, the improvement in vibration transmission efficiency and the durability of the bone conduction speaker has a significant impact on the user experience.
[0028] The vibrating element 130 of the bone conduction speaker can be made of zirconium oxide. Zirconia has a high melting point, high stiffness, and good chemical stability and biocompatibility, making it less likely to cause skin allergies when in contact with the vibrating element 130 made of zirconium oxide. More importantly, zirconium oxide has a higher vibration conductivity compared to other common materials. Tr This means that the bone conduction speaker, which uses zirconium oxide as the vibrator 130, can transmit the vibrations generated by the vibrator 120 to the user's skin to the greatest extent possible.
[0029] The material commonly used in bone conduction speakers where they contact the user's skin is rubber. Therefore, the following analysis will focus on two materials: rubber and zirconium oxide. For ease of calculation, the vibrating element 130 of this application is geometrically abstracted as having a cross-sectional diameter of 2cm, a thickness of 0.5cm, and a volume of 1.57cm³. 3 Density is 6 g / cm³ 3 ,quality The zirconia cylinder is shown here. It should be noted that the dimensions are for the convenience of calculation and demonstration. The actual dimensions of the vibrating element 130 in this application are not completely consistent with the cylinder.
[0030] The human ear is sensitive to sound frequencies of approximately ,Right now The damping ratio of zirconium oxide is approximately The Young's modulus is approximately 225 GPa. The stiffness is calculated using the stiffness calculation formula. ,in A Let L be the cross-sectional area of the cylinder and L be the length of the cylinder. The natural frequency of the above-mentioned zirconia cylinder is... The frequency ratio is .
[0031] The above-mentioned zirconium oxide cylinder can be abstracted as follows: Figure 6 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:
[0032] The vibration conductivity Tr of the rubber vibrating element is calculated in the same way: The rubber vibrating component 130 is geometrically abstracted as having a cross-sectional diameter of 2cm, a thickness of 0.5cm, and a volume of 1.57cm³. 3 Density is 1.15 g / cm³ 3 ,quality A rubber cylinder. The damping ratio of the rubber is approximately... The Young's modulus is approximately 5 MPa. Calculate the stiffness using the stiffness calculation formula. The natural frequency of the aforementioned rubber cylinder is... The frequency ratio is .
[0033] Abstracting the above rubber cylinder as follows: Figure 6 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:
[0034] The above calculation results show that the vibration transmission rate Tr of the bone conduction speaker 130 made of zirconia is higher than that of rubber. In practical applications, the gap between the two will be further increased compared with the theoretical calculation value. Therefore, the use of zirconia material for the zirconia 130 can reduce the energy loss of vibration transmission.
[0035] Zirconia is a type of ceramic material. It has high rigidity but is brittle, so it needs to be protected from violent impacts. Optionally, the annular surface 1321 of the first connecting portion 132 and / or the surface of the vibration transmission column 121 that contacts the first connecting portion 132 have a fastening structure to distribute the pressure on the plane 1322 of the first connecting portion 132.
[0036] When both the annular surface 1321 of the first connecting portion 132 and the surface of the vibration transmission column 121 are smooth, the vibration transmitted from the oscillator 120 to the vibrating element 130 is achieved by the top of the vibration transmission column 121 striking the plane 1322 of the first connecting portion 132. Long-term striking and external force may cause the plane 1322 of the first connecting portion 132 to experience significant instantaneous pressure, leading to cracks and other damage. Therefore, a fastening structure can be added to the annular surface 1321 of the first connecting portion 132 to distribute the pressure on the plane 1322, thereby improving the durability of the vibrating element 130. Similarly, a fastening structure can be added to the surface where the vibration transmission column 121 contacts the first connecting portion 132 to distribute the pressure on the plane 1322 of the first connecting portion 132.
[0037] Optionally, the fastening structure includes adhesive. Connecting the vibration transmission column 121 and the annular surface 1321 with adhesive allows for full utilization of the annular surface 1321 of the first connecting portion 132 for vibration transmission, increasing the force-bearing area, improving the connection stability between the vibration transmission column 121 and the vibrating element 130, and enhancing the durability of the vibrating element 130. For example, using adhesive as a fastening structure can increase the friction between the annular surface 1321 and the vibration transmission column 121, dispersing the pressure on the plane 1322 of the first connecting portion 132. Connecting the annular surface 1321 of the first connecting portion 132 and the vibration transmission column 121 with adhesive as a fastening structure can transfer the pressure on the plane 1322 of the first connecting portion 132 to the adhesive, even achieving the technical effect that the plane 1322 does not contact the vibration transmission column 121, and the plane 1322 is not subjected to force.
[0038] like Figure 4A As shown, the inner surface of the vibrating element 130 is not a plane, but a curved surface with undulations that is centrally symmetrical with respect to the vibration transmission column 121. Ideally, the vibration directions of the vibrator 120 and the vibrating element 130 are both along the vibration transmission column 121. However, in reality, due to user movement or other interference factors while wearing the bone conduction headphones 200, the vibration directions of the vibrator 120 and the vibrating element 130 may not be completely along the direction of the vibration transmission column 121. Therefore, the vibrating element 130 may have slight vibrations perpendicular to the direction of the vibration transmission column 121. The axisymmetric annular protrusion structure not only facilitates the fixation of the vibration transmission column 121 and the support connector 140, but also disperses the vibration perpendicular to the direction of the vibration transmission column 121 using the annular structure, making the force on the vibrating element 130 more uniform and improving the durability of the vibrating element 130.
[0039] like Figure 5A As shown, the vibrator 120 includes a spring piece 123, which is disposed on the surface of the vibrator body 122 facing the vibration transmission column 121. The center of the spring piece 123 is connected to the first connecting part 132 through the vibration transmission column 121. After receiving an audio electrical signal, the vibrator 120 of the bone conduction speaker drives the spring piece 123 to vibrate at a high frequency, and transmits the vibration to the vibrating element 130 through the spring piece 123. The center of the spring piece 123 has a larger vibration amplitude and transmits more energy. Therefore, directly connecting the central area of the spring piece 123, rather than the edge area, to the vibration transmission column 121 can improve the vibration transmission efficiency and prevent energy loss.
[0040] like Figure 5BAs shown, the length of the annular surface 1321 of the first connecting part 132 along the vibration direction of the vibration transmission column 121 is less than the length of the vibration transmission column 121, and there is a redundant space 160 between the first connecting part 132 and the spring piece 123. By setting the redundant space 160, the spring piece 123 and the first connecting part 132 do not collide, increasing the service life of the spring piece 123. When the vibration transmission column 121 is not in contact with the plane 1322 and the surfaces of the annular surface 1321 and the vibration transmission column 121 are smooth in the static state, the setting of the redundant space 160 can shield slight disturbances. For example, when the oscillator 120 moves slightly in the direction of the vibrating element 130, no force is generated between the vibration transmission column 121 and the vibrating element 130 due to the existence of the redundant space 160.
[0041] like Figure 2C and Figure 3 As shown, the bone conduction speaker 100 also includes a housing 110 and a support connector 140. The housing 110 may be made of rigid plastic and is connected to the support connector 140 but not in contact with the vibrating element 130. The second connecting portion 131 of the vibrating element 130 is connected to the support connector 140. The support connector 140 is made of a different material than the vibrating element 130, and the vibration transmission rate of the support connector 140 is lower than that of the vibrating element 130. The support connector 140 is made of silicone and is used to connect the housing 110 and the vibrating element 130. The second connecting portion 131 of the vibrating element 130 has a top and bottom edge wrapping structure, which is in full contact with the support connector 140; the ear portion of the support connector 140 clamps the housing 110 from top and bottom, and is in full contact with the housing 110. The support connector 140 effectively isolates the housing 110 from the vibrating element 130. Because the silicone material of the support connector 140 has excellent shock absorption and sound insulation properties, it can isolate the vibration of the vibrating element 130 from the housing 110. Conventional bone conduction headphones use the housing directly as the vibrating element, or the housing is directly connected to the vibrating element. Therefore, 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 the support connector 140.
[0042] like Figure 2B As shown, the projected area of the vibrating element 130 on the plane perpendicular to the vibration transmission column 121 is less than half the projected area of the housing 110, and the projected area of the vibrating element 130 on the plane perpendicular to the vibration transmission column 121 is less than the projected area of the oscillator body 122. Figure 5AAs shown, the vibrator body 122 refers to the part of the vibrator 120 excluding the vibrating plate 123 and the vibration transmission column 121. The projection of the vibrator body 122 onto the plane perpendicular to the vibration transmission column 121 is circular. The projected area of the vibrating element 130 onto the plane perpendicular to the vibration transmission column 121 has a significant impact on the performance of the bone conduction speaker. An excessively large area of the vibrating element 130 leads to material waste and indirectly reduces the area of the support connector 140, resulting in a poorer vibration damping and sound insulation effect. Simultaneously, an excessively large area of the vibrating element 130 may also cause the vibration felt by the user's skin to be more dispersed, producing an uncomfortable tingling or itchy sensation. The projected area of the vibrating element 130 onto the plane perpendicular to the vibration transmission column 121 is smaller than the projected area of the vibrator body 122, which is a more suitable size for the vibrating element 130. Specifically, in this application, the projected area of the vibrating element 130 is 104 mm². 2 The projected area of the oscillator body 122 is 152 mm. 2 This reduces material usage and improves vibration damping and sound insulation while ensuring sufficient vibration transmission. Since the bone conduction speaker of this application is preferably used in the field of hearing aids, hearing-impaired users typically adjust the vibration amplitude of the vibrator to a larger setting. In this case, there is a stronger need to reduce sound leakage.
[0043] From the perspective of material saving, the structure of this application, which connects to the vibration transmission column 121 via the first connecting part 132, also achieves the technical effect of saving materials and reducing connection difficulty while ensuring vibration conductivity. The specific demonstration process is as follows: For ease of calculation, the vibration transmission column 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 column .
[0044] 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 column is... The frequency ratio is .
[0045] The aforementioned vibration transmission column can be abstracted as follows: Figure 6 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:
[0046] According to the above It is known that the diameter d of the vibration transmission column 121 has a negligible effect on the vibration conductivity. Therefore, the technical solution of this application, which is to receive the vibration from the vibration transmission column 121 through the first connecting part 132, compared with the traditional method of directly contacting the oscillator body with the vibrating element, uses less material. Because the diameter of the vibration transmission column 121 is smaller, it is easier to achieve a tight connection between the vibration transmission column 121 and the vibrating element 130, thereby obtaining a better vibration transmission effect, more concentrated and delicate vibration, and reducing the uncomfortable numbness and itching sensation for the user.
[0047] This application addresses the technical problems of dispersed vibration transmission from the vibrator to the vibrating element, significant energy loss during vibration transmission, low vibration transmission efficiency, and poor stability of the vibrating element by designing a vibrating element and a corresponding bone conduction loudspeaker. This achieves the technical effect of improving vibration transmission efficiency. The bone conduction loudspeaker of this application is preferably used in the field of hearing aids. For hearing-impaired users, the improved vibration transmission efficiency and durability of the bone conduction loudspeaker have a significant impact on the user experience.
[0048] 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 vibrating element for a bone conduction loudspeaker, characterized in that, include: The first connecting part (132) has a centroidal axis (X) that coincides with the centroidal axis (X) of the main body (133). The first connecting part (132) is a hollow column. The inner surface of the first connecting part (132) includes an annular surface (1321) and a plane (1322) for surrounding the insertion vibration transmission column (121). The main body (133) has an outer surface that contacts the user's skin and an inner surface that faces the oscillator body (122). The main body (133) is integrally formed with the first connecting part (132). The second connecting part (131) is integrally formed with the main body part (133). The second connecting part (131) connects to the support connector (140). The second connecting part (131) clamps the support connector (140) along the direction of the centroidal axis (X). The vibration transmission column (121) is directly connected to the oscillator body (122) and there is no support structure between them. The vibration transmission column (121) is used to directly transmit the vibration generated by the oscillator (120) to the first connecting part (132). The centroidal axis (X) is perpendicular to the inner surface of the main body (133). The supporting connector (140) is made of a different material than the vibrating element (130). The vibration transmission rate of the supporting connector (140) is less than that of the vibrating element (130).
2. The vibrating element of the bone conduction loudspeaker according to claim 1, characterized in that, The annular surface (1321) of the first connecting part (132) and / or the surface of the vibration transmission column (121) that contacts the first connecting part (132) have a fastening structure to disperse the pressure on the plane (1322) of the first connecting part (132).
3. The vibrating element of the bone conduction loudspeaker according to claim 2, characterized in that, The fastening structure includes adhesive.
4. The vibrating element of the bone conduction loudspeaker according to claim 1, characterized in that, The annular surface (1321) includes at least one of a columnar surface and a platform surface.
5. The vibrating element of the bone conduction loudspeaker according to claim 4, characterized in that, The vibrating element (130) of the bone conduction speaker is made of zirconium oxide.
6. The vibrating element of the bone conduction loudspeaker according to claim 5, characterized in that, The annular surface (1321) includes at least one of a cylindrical surface and a frustum surface.
7. The vibrating element of the bone conduction loudspeaker according to claim 1, characterized in that, The first connecting part (132) is connected to the center of the spring piece (123) through the vibration transmission column (121), and the spring piece (123) is disposed on the surface of the oscillator body (122) facing the vibration transmission column (121).
8. The vibrating element of the bone conduction loudspeaker according to claim 7, characterized in that, The length of the annular surface (1321) of the first connecting part (132) is less than the length of the centroidal axis of the vibration transmission column (121), and there is a redundant space (160) between the first connecting part (132) and the spring piece (123).
9. A bone conduction loudspeaker, characterized in that, include: The oscillator (120) includes a vibration transmission column (121) that transmits vibration to the vibrating element (130). Vibrating element (130), the vibrating element (130) having the structure of the vibrating element of the bone conduction loudspeaker as described in any one of claims 1-8; The housing (110) is connected to the support connector (140) and does not contact the vibrating element (130); A support connector (140) is used to connect the housing (110) and the vibrating element (130).
10. The bone conduction loudspeaker according to claim 9, characterized in that, The projected area of the vibrating element (130) on the plane perpendicular to the vibration transmission column (121) is smaller than the projected area of the oscillator body (122).