Bone conduction vibration transmission sheet and bone conduction vibrator

Abstract

The utility model discloses a kind of bone conduction vibration transmission sheets, including vibration transmission sheet body, vibration transmission sheet body includes with the center connecting portion of vibrator drive source connection, and the fixed part of the circumferential setting in the center connecting portion outside, vibration radiation part is shaped between the center connecting portion and the fixed part, vibration radiation part includes at least two arc vibration beams, the inner end of arc vibration beam is connected to the center connecting portion, outer end is connected to the fixed part, and arc vibration beam is symmetrically distributed around the center point of center connecting portion, arc vibration beam evenly separates in circumferential direction with the center connecting portion, fixed part, and the position space where the hollow part is located is jointly defined by the center connecting portion, fixed part and adjacent two arc vibration beams, the utility model has significantly improved vibration efficiency, evenly radiates vibration energy outward, reaches the effect of optimizing sound quality.

Description

Technical Field

[0001] This utility model relates to the field of bone conduction technology, and in particular to a bone conduction vibrating plate and a bone conduction oscillator. Background Technology

[0002] Bone conduction technology is a method of transmitting sound signals through the bones. Its basic principle is to convert electrical signals into mechanical vibrations, which are then transmitted directly to the inner ear through the skull, jawbone, and other structures, allowing the person to perceive sound. Compared to traditional headphones that transmit sound through the air, bone conduction devices have advantages such as not blocking the ear canal and maintaining ambient sound transparency. They are widely used in hearing aids, professional communication headphones, sports headphones, and hearing protection devices.

[0003] The vibration transducer is a key component in bone conduction devices, its function being to efficiently transmit the micro-vibrations generated by the oscillator to the contact surface. Traditional vibration transducers typically employ a simple flat plate structure or are composed of radially radiating straight-arm beams. The former has high rigidity, requiring a larger driving force to produce effective deformation, resulting in low energy conversion efficiency, while the latter, during vibration, has a single deformation mode, making it difficult to radiate vibrational energy evenly outward. Utility Model Content

[0004] The purpose of this invention is to provide a bone conduction vibrating pad and a bone conduction oscillator, which significantly improves vibration efficiency, evenly radiates vibration energy outward, and achieves the effect of optimizing sound quality.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a bone conduction vibration transducer, comprising a transducer body, the transducer body including a central connecting part connected to an oscillator drive source, and a fixed part circumferentially disposed outside the central connecting part, a vibration radiation part formed between the central connecting part and the fixed part, the vibration radiation part including at least two arc-shaped vibration beams, the inner end of the arc-shaped vibration beams being connected to the central connecting part, the outer end being connected to the fixed part, and the arc-shaped vibration beams being symmetrically distributed around the center point of the central connecting part, the arc-shaped vibration beams uniformly separating the central connecting part and the fixed part circumferentially, the transducer body also having a hollow part, the central connecting part, the fixed part and the two adjacent arc-shaped vibration beams jointly defining the spatial location of the hollow part.

[0006] A further feature of this invention is that both the central connecting part and the fixed part are circular, and the center of the central connecting part coincides with the center of the fixed part. The arc-shaped vibration beams are all spirally and symmetrically distributed around the center of the central connecting part.

[0007] A further feature of this invention is that the width of the arc-shaped vibration beam gradually narrows and then widens from its inner end to its outer end, and the width of the hollowed-out portion gradually widens and then narrows accordingly, with the narrowest point of the arc-shaped vibration beam corresponding to the widest point of the hollowed-out portion.

[0008] A further feature of this invention is that the arc-shaped vibration beam is wave-shaped, with its troughs recessed toward the central connecting portion, forming a first narrow segment of the hollow portion. The first narrow segment divides the hollow portion into a first inner segment near the central connecting portion and a first outer segment near the fixing portion. The width of the first narrow segment is less than the narrowest width of the inner segment and the outer segment.

[0009] A further feature of this invention is that the arc-shaped vibration beam includes a first corner segment connected to the central connecting portion, a second corner segment connected to the fixed portion, and an arc segment formed between the first corner segment and the second corner segment. A second narrow segment of the hollow portion is formed between the first corner segment and the adjacent second corner segment of the arc-shaped vibration beam. The second narrow segment divides the hollow portion into a second inner segment near the central connecting portion and a second outer segment near the fixed portion. The width of the second narrow segment is less than the narrowest width of the second inner segment and the second outer segment. The second inner segment and the adjacent second outer segment are both concentric arc structures.

[0010] A further feature of this invention is that the central connecting portion has a hollow structure.

[0011] A further feature of this invention is that the arc-shaped vibration beam gradually narrows and then thickens from the outer end to the inner end, and the width of the hollowed-out portion gradually narrows and then widens accordingly, with the narrowest point of the arc-shaped vibration beam corresponding to the widest point of the hollowed-out portion.

[0012] A further feature of this invention is that the arc-shaped vibration beam is wave-shaped, and its outline includes a wave crest protruding towards the fixed part and a wave trough protruding towards the central connecting part. The radius of curvature of the wave crest is smaller than that of the wave trough. The outer contour of the arc-shaped vibration beam from the inner end to the wave crest section is concentrically set with the outer contour of the central connecting part. The width of the hollow part forms a third narrow segment at the position corresponding to the wave crest. The widths of the two ends of the third narrow segment gradually widen and then narrow.

[0013] A further feature of this invention is that the vibration transducer body is in the shape of a ring track, and there are four arc-shaped vibration beams arranged symmetrically along the long axis and short axis of the ring track, so that two opposite arc-shaped vibration beams are centrally symmetrical about the center of the central connection. The inner ends of two adjacent arc-shaped vibration beams are respectively connected to the center of the arc-shaped portion and the center of the straight portion of the central connecting part, and the outer ends are respectively connected to the center of the straight portion and the center of the arc-shaped portion of the fixing part.

[0014] A further feature of this invention is: a bone conduction oscillator, employing the aforementioned bone conduction transducer.

[0015] In summary, this utility model has the following beneficial effects: 1. The inner end of the arc-shaped vibration beam is connected to the central connection part, and the outer end is connected to the fixed part. The arc-shaped vibration beam is symmetrically distributed around the center point of the central connection part. The symmetry is effectively used to ensure the consistency of vibration in all directions, avoid the polarization phenomenon caused by structural asymmetry, make the vibration more uniform and stable, and improve the efficiency and intensity of vibration radiation.

[0016] 2. The width of the arc-shaped vibration beam gradually narrows and then widens from its inner end to its outer end, and the width of the hollow part correspondingly gradually widens and then narrows. The narrowest point of the arc-shaped vibration beam corresponds to the widest point of the hollow part, which effectively avoids excessive concentration of vibration force at the inner and outer ends, and improves the service life and reliability of the structure.

[0017] 3. The use of a wavy, arc-shaped vibrating beam effectively increases the actual length of the beam, resulting in a longer vibration transmission path. This helps to lower the natural frequency of the vibration, making it more suitable for audio vibration. The troughs of the wavy, arc-shaped vibrating beam are recessed towards the central connecting part, forming a first narrow segment of the hollowed-out portion. This first narrow segment divides the hollowed-out portion into a first inner segment near the central connecting part and a first outer segment near the fixing part. The width of the first narrow segment is smaller than the narrowest width of the inner and outer segments, limiting excessive vibration of the arc-shaped vibrating beam corresponding to the first narrow segment. This suppresses unnecessary high-frequency harmonics, making the vibration more prominent and pure, and improving the clarity of the sound. In addition, the wavy, arc-shaped vibrating beam effectively increases the area of ​​the hollowed-out portion corresponding to the fixing part, preventing the glue from sticking to adjacent arc-shaped vibrating beams during compression and ensuring the vibration effect of the arc-shaped vibrating beam.

[0018] 4. The hollowed-out central connection section achieves a lightweight design. The oscillator drive source drives the arc-shaped vibration beam to vibrate through the inner ring of the central connection section, reducing the ineffective mass of the central connection section. This helps to reduce the overall mass and inertia of the transmission plate, making it easier to drive and effectively reducing the resonant frequency.

[0019] 5. The ring-shaped transducer body is more easily adapted to the narrow and elongated structure of common bone conduction products such as eyeglass temples and headphone arms, saving space and increasing the freedom of industrial design. Attached Figure Description

[0020] Figure 1This is a schematic diagram of Embodiment 1 of the present utility model.

[0021] Figure 2 This is a schematic diagram of Embodiment 2 of this utility model.

[0022] Figure 3 This is a schematic diagram of Embodiment 3 of this utility model.

[0023] Figure 4 This is a schematic diagram of Embodiment 4 of this utility model.

[0024] Figure 5 This is a schematic diagram of Embodiment 5 of this utility model.

[0025] Figure 6 This is a schematic diagram of Embodiment Six of this utility model.

[0026] In the diagram: 1. Vibration transducer body; 11. Central connecting part; 12. Fixing part; 121. Extension part; 13. Arc-shaped vibration beam; 131. Inner end; 132. Outer end; 133. First corner segment; 134. Second corner segment; 135. Arc segment; 136. Crest; 137. Trough; 14. Hollowed-out part; 141. First inner segment; 142. First outer segment; 143. First narrow segment; 144. Second inner segment; 145. Second outer segment; 146. Second narrow segment; 147. Third narrow segment; 148. Wide segment. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Example 1: A type of bone conduction transducer, such as Figure 1As shown, the device includes a vibration transducer body 1, which includes a central connecting part 11 connected to an oscillator drive source and a fixing part 12 circumferentially disposed outside the central connecting part 11. A vibration radiation part is formed between the central connecting part 11 and the fixing part 12. The central connecting part 11, the fixing part 12, and the vibration radiation part are all integrally formed. The vibration radiation part includes at least two arc-shaped vibration beams 13. The inner end 131 of the arc-shaped vibration beams 13 is connected to the central connecting part 11, and the outer end 132 is connected to the fixing part 12. The arc-shaped vibration beams 13 are symmetrically distributed around the center point of the central connecting part 11. The arc-shaped vibration beams 13 evenly separate the central connecting part 11 and the fixing part 12 circumferentially. The vibration transducer body 1 also has a hollow part 14. The central connecting part 11, the fixing part 12, and the two adjacent arc-shaped vibration beams 13 jointly define the spatial location of the hollow part 14. The design of the hollowed-out portion 14 significantly reduces the overall rigidity of the vibration transducer body 1, making the arc-shaped vibration beam 13 more prone to deformation, thereby reducing the energy required for driving. Simultaneously, it allows the vibration transducer to better conform to the curvature of human skin and bones, improving wearing comfort and vibration transmission. Vibration energy is input from the oscillator drive source on the central connecting portion 11, transmitted through the vibration radiation portion, and radiated to the human skeleton. The fixing portion 12 is used to fix the vibration transducer, for example, by applying adhesive to the fixing portion 12 to fix the vibration transducer inside the oscillator.

[0029] Preferably, both the central connecting portion 11 and the fixing portion 12 are circular, and the centers of the central connecting portion 11 and the fixing portion 12 coincide. This circular and concentric structural design further enhances the axial symmetry of the vibration, making the vibration energy radiate more evenly from the central connecting portion 11 to the surrounding arc-shaped vibration beams 13, thereby improving the sound quality of bone conduction. The arc-shaped vibration beams 13 are all spirally symmetrically distributed around the center of the central connecting portion 11. Spiral symmetry refers to the ability of an object or structure to perfectly coincide with itself after rotating at any angle around a fixed axis and translating any distance along that axis. This is the basic concept of spiral symmetry and will not be elaborated further here. This structure effectively converts the longitudinal vibration of the driving source into the bending vibration of the vibration transducer body 1, and utilizes symmetry to ensure the consistency of vibration in all directions, avoiding polarization phenomena caused by structural asymmetry, making the vibration more uniform and stable, and improving the efficiency and intensity of vibration radiation.

[0030] Preferably, the width of the arc-shaped vibration beam 13 gradually narrows and then widens from its inner end 131 to its outer end 132, and the width of the hollow portion 14 correspondingly gradually widens and then narrows, with the narrowest point of the arc-shaped vibration beam 13 corresponding to the widest point of the hollow portion 14. The narrower the arc-shaped vibration beam 13, the lower its stiffness and the greater its deformation amplitude during vibration; conversely, the thicker the arc-shaped vibration beam 13, the stronger its stiffness and the smaller its deformation amplitude during vibration. Through the above design, excessive concentration of vibration force at the inner end 131 and the outer end 132 is effectively avoided, improving the service life and reliability of the structure.

[0031] Example 2: A type of bone conduction transducer, such as Figure 2 As shown, the difference between this embodiment and specific embodiment one is that the arc-shaped vibration beam 13 is wavy, with its trough 137 recessed towards the central connecting portion 11, forming the first narrow segment 143 of the hollow portion 14. The first narrow segment 143 divides the hollow portion 14 into a first inner segment 141 near the central connecting portion 11 and a first outer segment 142 near the fixing portion 12. The width of the first narrow segment 143 is smaller than the narrowest width of the inner and outer segments. The wavy arc-shaped vibration beam 13 structure effectively increases the actual length of the vibration beam within a limited space, making the vibration transmission path longer, which is beneficial to reducing the natural frequency of the vibration and making it more suitable for audio vibration. By setting the first narrow segment 143, excessive vibration of the arc-shaped vibration beam 13 corresponding to the first narrow segment 143 is limited, thereby suppressing unnecessary high-frequency harmonics, making the vibration more prominent and pure, and improving the clarity of the sound.

[0032] Example 3: A type of bone conduction transducer, such as Figure 3As shown, the difference between this embodiment and specific embodiment two is that: the arc-shaped vibration beam 13 includes a first corner segment 133 connected to the central connecting part 11, a second corner segment 134 connected to the fixed part 12, and an arc segment 135 formed between the first corner segment 133 and the second corner segment 134. The first corner segment 133 and the adjacent second corner segment 134 of the arc-shaped vibration beam 13 form a second narrow segment 146 of the hollow part 14. The second narrow segment 146 divides the hollow part 14 into a second inner segment 144 near the central connecting part 11 and a second outer segment 145 near the fixed part 12. The width of the second narrow segment 146 is smaller than the narrowest width of the second inner segment 144 and the second outer segment 145. The second inner segment 144 and the adjacent second outer segment 145 are both concentric arc structures. By setting the first corner segment 133, the second corner segment 134, and the middle arc segment 135, a smooth transition in stiffness from the center to the edge of the arc-shaped vibrating beam 13 is achieved. The second narrow segment 146 limits excessive vibration of the corresponding arc-shaped vibrating beam 13, thereby suppressing unnecessary high-frequency harmonics, making the vibration more prominent and pure, and improving sound clarity. Furthermore, the concentric arc structure of the second inner segment 144 and the adjacent second outer segment 145 results in a compact and rational material distribution and arrangement of the hollow spaces, enhancing the overall structural stability and mechanical strength while ensuring good vibration performance.

[0033] Example 4: A type of bone conduction transducer, such as Figure 4 As shown, the difference between this embodiment and specific embodiment two is that the central connecting part 11 is provided with a hollow structure. The hollow structure is preferably a circular structure set at the center of the central connecting part 11, making the central connecting part 11 annular. Through the above structure, a lightweight design is achieved. The oscillator drive source drives the arc-shaped vibration beam 13 to vibrate through the inner ring of the central connecting part 11, reducing the ineffective mass of the central connecting part 11, which helps to reduce the overall mass and inertia of the transmission plate, making it easier to be driven, and effectively reducing the resonant frequency.

[0034] In a preferred embodiment, the fixing part 12 has an extension 121 formed thereon, the extension 121 protruding outward from the fixing part 12, and the outer end 132 of the arc-shaped vibration beam 13 is connected to the extension 121. The extension 121 on the fixing part 12 increases the contact area for bonding, making the vibration transducer plate more firmly fixed.

[0035] Preferably, the arc-shaped vibration beam 13 gradually narrows and then widens from its outer end 132 to its inner end 131, and the width of the hollow portion 14 correspondingly gradually widens and then narrows, with the narrowest point of the arc-shaped vibration beam 13 corresponding to the widest point of the hollow portion 14. This design effectively avoids excessive concentration of vibration force at the inner end 131 and the outer end 132, improving the service life and reliability of the structure.

[0036] Example 5: A type of bone conduction transducer, such as Figure 5 As shown, the difference between this embodiment and specific embodiment one is that: the arc-shaped vibration beam 13 is wave-shaped, and its outline includes a wave crest 136 protruding towards the fixed part 12 and a wave trough 137 protruding towards the central connecting part 11. The radius of curvature of the wave crest 136 is smaller than that of the wave trough 137, forming an asymmetrical wave-shaped structure. This design makes the arc-shaped vibration beam 13 have different stiffness in the two directions towards the central connecting part 11 and towards the fixed part 12, which can be used to adjust the characteristics of vibration transmission inward and outward in a targeted manner. For example, it can enhance the vibration output to the fixed part 12. The outer contour of the arc-shaped vibration beam 13 from the inner end 131 to the wave crest 136 is concentrically set with the outer contour of the central connecting part 11. The width of the hollow part 14 forms a third narrow segment 147 at the position corresponding to the wave crest 136. The width of the two ends of the third narrow segment 147 changes from widening to narrowing. In addition, the arc-shaped vibration beam 13 is set to a wave shape, which effectively increases the area of ​​the hollow part 14 corresponding to the fixing part 12, so that the glue will not stick to the adjacent arc-shaped vibration beam 13 when it is squeezed and fixed, thus ensuring the vibration effect of the arc-shaped vibration beam 13.

[0037] Example 6: A type of bone conduction transducer, such as Figure 6 As shown, the difference between this embodiment and specific embodiment one is that the vibration transmission plate body 1 is in the shape of a ring track. The ring track-shaped vibration transmission plate body 1 is more easily adapted to the narrow and long structure of common bone conduction products such as eyeglass temples and headphone arms, saving space and improving the freedom of industrial design.

[0038] There are four arc-shaped vibration beams 13, which are symmetrically arranged along the long axis and short axis of the circular track. This makes the two opposite arc-shaped vibration beams centrally symmetrical about the center of the central connection. This symmetrical design ensures that the vibration energy is evenly distributed when it radiates from the central connection 11 to the fixed part 12, reducing vibration distortion and thus improving the clarity and stability of sound transmission. The inner ends 131 of the two adjacent arc-shaped vibration beams 13 are respectively connected to the center of the arc-shaped part and the center of the straight part of the central connecting part 11, and the outer ends 132 are respectively connected to the center of the straight part and the center of the arc-shaped part of the fixing part 12. This connection method effectively disperses the vibration stress, avoids stress concentration points, reduces the risk of fatigue fracture, and extends the service life of the vibration transducer. In a preferred embodiment, the arc-shaped vibration beam 13 connecting the center of the arc-shaped portion of the central connecting part 11 and the center of the straight portion of the fixed part 12 has a longer length than the arc-shaped vibration beam 13 connecting the center of the straight portion of the central connecting part 11 and the center of the arc-shaped portion of the fixed part 12. This length difference design utilizes the geometric characteristics of the ring track structure to make the vibration transducer have differentiated vibration modes in different directions, which can broaden the working frequency range and thus improve the fidelity and sensitivity of bone conduction sound. In a preferred embodiment, the arc-shaped vibration beam 13 includes a first corner segment 133 connected to the central connecting part 11, a second corner segment 134 connected to the fixing part 12, and an arc segment 135 formed between the first corner segment 133 and the second corner segment 134. The first corner segment 133 and the second corner segment 134 of the adjacent arc-shaped vibration beam 13 form a wide segment 148 of the hollow part 14. The width of the two ends of the wide segment 148 gradually narrows. Through the above design, sufficient flexibility is provided not only in the long axis direction, but also structural strength in the short axis direction is guaranteed.

[0039] In addition, this utility model also provides a bone conduction vibrator, which adopts a bone conduction vibrating plate as described in Examples 1 to 6. It has comprehensive advantages such as high vibration efficiency, clear sound quality, reliable structure, long life and easy product adaptation, and can significantly improve the overall performance of bone conduction loudspeakers.

[0040] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A bone conduction transducer, comprising a transducer body (1), characterized in that: The transducer body (1) includes a central connecting part (11) connected to the oscillator drive source and a fixed part (12) circumferentially disposed outside the central connecting part (11). A vibration radiation part is formed between the central connecting part (11) and the fixed part (12). The vibration radiation part includes at least two arc-shaped vibration beams (13). The inner end (131) of the arc-shaped vibration beam (13) is connected to the central connecting part (11), and the outer end (132) is connected to the fixed part (12). The arc-shaped vibration beams (13) are symmetrically distributed around the center point of the central connecting part (11). The arc-shaped vibration beams (13) evenly separate the central connecting part (11) and the fixed part (12) circumferentially. The transducer body (1) is also provided with a hollow part (14). The central connecting part (11), the fixed part (12), and the two adjacent arc-shaped vibration beams (13) jointly define the spatial location of the hollow part (14).

2. The bone conduction transducer according to claim 1, characterized in that: Both the central connecting part (11) and the fixing part (12) are circular, and the center of the central connecting part (11) and the center of the fixing part (12) coincide. The arc-shaped vibration beams (13) are all spirally symmetrically distributed around the center of the central connecting part (11).

3. The bone conduction transducer according to claim 2, characterized in that: The width of the arc-shaped vibrating beam (13) gradually narrows and then widens from its inner end (131) to its outer end (132), and the width of the hollow part (14) gradually widens and then narrows accordingly. The narrowest part of the arc-shaped vibrating beam (13) corresponds to the widest part of the hollow part (14).

4. The bone conduction vibration transducer according to claim 2, characterized in that: The arc-shaped vibrating beam (13) is wavy, with its troughs (137) recessed toward the central connecting part (11) and forming the first narrow segment (143) of the hollow part (14). The first narrow segment (143) divides the hollow part (14) into a first inner segment (141) near the central connecting part (11) and a first outer segment (142) near the fixing part (12). The width of the first narrow segment (143) is less than the narrowest width of the inner segment and the outer segment.

5. A bone conduction transducer according to claim 2, characterized in that: The arc-shaped vibration beam (13) includes a first corner segment (133) connected to the central connecting part (11), a second corner segment (134) connected to the fixed part (12), and an arc segment (135) formed between the first corner segment (133) and the second corner segment (134). The first corner segment (133) and the second corner segment (134) of the adjacent arc-shaped vibration beam (13) form a second narrow segment (146) of the hollow part (14). The second narrow segment (146) divides the hollow part (14) into a second inner segment (144) near the central connecting part (11) and a second outer segment (145) near the fixed part (12). The width of the second narrow segment (146) is smaller than the narrowest width of the second inner segment (144) and the second outer segment (145). The second inner segment (144) and the adjacent second outer segment (145) are both concentric arc structures.

6. A bone conduction transducer according to claim 2, characterized in that: The central connecting part (11) is provided with a hollow structure.

7. A bone conduction transducer according to claim 6, characterized in that: The arc-shaped vibrating beam (13) gradually narrows and then widens from its outer end (132) to its inner end (131), and the width of the hollow part (14) gradually widens and then narrows accordingly. The narrowest part of the arc-shaped vibrating beam (13) corresponds to the widest part of the hollow part (14).

8. A bone conduction transducer according to claim 6, characterized in that: The arc-shaped vibrating beam (13) is wave-shaped, and its outline includes a wave crest (136) protruding towards the fixed part (12) and a wave trough (137) protruding towards the central connecting part (11). The radius of curvature of the wave crest (136) is smaller than the radius of curvature of the wave trough (137). The outer contour of the arc-shaped vibrating beam (13) from the inner end (131) to the wave crest (136) is concentrically set with the outer contour of the central connecting part (11). The width of the hollow part (14) forms a third narrow segment (147) at the position corresponding to the wave crest (136). The width of the two ends of the third narrow segment (147) changes from widening to narrowing.

9. A bone conduction transducer according to claim 1, characterized in that: The vibration plate body (1) is in the shape of a ring track, and there are four arc-shaped vibration beams (13), which are symmetrically arranged along the long axis and short axis of the ring track, so that the two opposite arc-shaped vibration beams are centrally symmetrical about the center of the central connection part. The inner ends (131) of the two adjacent arc-shaped vibration beams (13) are respectively connected to the center of the arc-shaped part and the center of the straight part of the central connecting part (11), and the outer ends (132) are respectively connected to the center of the straight part and the center of the arc-shaped part of the fixing part (12).

10. A bone conduction oscillator, characterized in that: The bone conduction transducer is used as described in any one of claims 1-9.

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