Integrated bone conduction hybrid sound production device

Abstract

The application relates to the earphone audio technical field and discloses an integrated bone conduction mixed sound generating device, which comprises an upper shell, a lower shell connected to the lower end of the upper shell, and a sealed closed containing cavity formed by the two; a buckling sleeve arranged in the containing cavity, wherein the lower part of the buckling sleeve is provided with a convex step along the outer periphery; a vibrator mechanism arranged in the buckling sleeve; a diaphragm sealedly connected to the end of the lower shell away from the upper shell, wherein the diaphragm is provided with a concave step along the outer periphery, the concave step is embedded in the convex step, and the diaphragm is connected and fixed with the buckling sleeve. The application combines the bone conduction vibration characteristics, the acoustic cavity resonance to emit medium and high frequency sound, and the internal air vibration extrusion to drive the diaphragm to emit medium and low frequency, so that the problem of insufficient low frequency of bone conduction is solved, the sound quality is close to full frequency transmission, and the effect of improving the sound quality is achieved. In the bone-air dual transmission sound mode, IP68 level waterproof and dustproof is realized.

Description

Technical Field

[0001] This application relates to the field of headphone audio technology, and specifically to an integrated bone conduction hybrid sound generation device. Background Technology

[0002] Most headphones on the market currently use two sound transmission modes: air conduction and / or bone conduction.

[0003] Air conduction headphones rely on air as the sound transmission medium. Their sound-generating structure needs to transmit sound to the eardrum through an open or semi-open acoustic channel (such as a space connected to the ear canal). To achieve IP68 waterproof rating (completely dustproof and capable of long-term immersion in deep water), this structure requires a strict seal of the acoustic channel. However, sealing directly blocks the air conduction path, preventing effective sound transmission and disrupting its sound-generating principle. Therefore, it is difficult to achieve a high level of waterproofing while maintaining sound quality. Bone conduction headphones transmit sound to the auditory nerve by vibrating the skull. They do not require an open acoustic channel, making it easier to achieve IP68 waterproof rating through a fully sealed design.

[0004] However, traditional bone conduction mainly relies on the mechanical vibration of the vibrator mechanism to transmit sound. It has a weak ability to reproduce mid-to-high frequencies and insufficient low-frequency performance. The sound transmitted by vibration lacks the sense of layering and detail brought by air conduction, and the overall sound quality appears thin and distorted, resulting in poor sound quality. Utility Model Content

[0005] This application provides an integrated bone conduction hybrid sound generation device, which aims to solve the problem of poor sound quality in the prior art.

[0006] In one embodiment, an integrated bone conduction hybrid sound generation device is provided, comprising:

[0007] The upper housing is fitted with the lower housing at its lower end, and the two are then sealed to form a closed receiving cavity.

[0008] A fastening tube is disposed in the receiving cavity, and a raised step is provided along its outer periphery at the lower part of the fastening tube;

[0009] A vibrating element mechanism, wherein the vibrating element mechanism is disposed within the fastening cylinder;

[0010] A diaphragm is sealed to the end of the lower housing away from the upper housing. The diaphragm has a concave step along its outer periphery that fits into the convex step, so that the diaphragm is connected and fixed to the fastening cylinder.

[0011] The acoustic cavity is formed between the snap-fit ​​cylinder and the diaphragm. After receiving the audio electrical signal, the vibrator mechanism converts the signal into periodic mechanical vibration through electromagnetic induction. The vibration is transmitted to the ossicles through the diaphragm and ear canal, realizing the function of air-to-sound transmission. The upper and lower shells are fitted together in the concha cavity, and the vibration of the outer shell is transmitted to the temporal bone through the concha cavity, realizing the function of bone-to-sound transmission.

[0012] In one embodiment, the inner wall of the upper housing is provided with an arc groove along its circumference that matches the upper end of the fastening cylinder, so that the upper end of the fastening cylinder can abut against the arc groove.

[0013] In one embodiment, the inner wall of the upper housing is provided with a groove along its circumference, and the inner side of the lower housing near the upper housing is provided with a protrusion that matches the groove, so that the protrusion is engaged in the groove, and the upper housing and the lower housing are sealed together at the joint away from the protrusion.

[0014] In one embodiment, the vibrator mechanism includes a base plate and a vibration groove disposed below the base plate. The base plate abuts against the fastening cylinder via a step at the upper end of the inner wall of the fastening cylinder. The vibration groove is connected to the inner wall of the fastening cylinder via a spring piece. A coil is provided at the lower end of the base plate, and a magnet is provided in the vibration groove. The magnet extends partially into the coil along its height direction.

[0015] In one embodiment, the inner wall of the snap-fit ​​cylinder is provided with a groove along its circumference to engage with the spring piece, so that the spring piece is snapped into the groove.

[0016] In one embodiment, the diaphragm extends centrally along the direction of the vibration groove to form a recess, and a demagnetizing sheet is provided on the outer side of the recess.

[0017] In one embodiment, the recess has a gap with the bottom of the vibration groove.

[0018] In one embodiment, the upper housing has a hole at the end away from the lower housing, and a connecting pipe is detachably installed in the hole. A controller is detachably connected to the end of the connecting pipe away from the upper housing. The controller contains a power supply and a control board, and the power supply and the control board are electrically connected.

[0019] In one embodiment, the controller has an external button that is electrically connected to the control board.

[0020] In one embodiment, the substrate is electrically connected to the control board.

[0021] The beneficial effects of this application are:

[0022] The vibrator mechanism is located within a completely sealed acoustic cavity. When powered on, it vibrates up and down, utilizing the vibration characteristics of bone conduction. This vibration, combined with the resonance of the acoustic cavity, generates mid-to-high frequency sounds. Furthermore, the internal air vibration compresses and drives the diaphragm to emit mid-to-low frequencies, thus solving the problem of insufficient low-frequency response in bone conduction. The sound quality is close to full-frequency transmission, thereby improving overall sound quality. Simultaneously, the fully sealed structure not only solves the problem of insufficient sound quality in traditional bone conduction but also achieves IP68 waterproof and dustproof ratings in the bone-air dual-transmission mode. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a hybrid sound-generating device in one embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure of a hybrid sound-generating device in one embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the controller structure in one embodiment of this application;

[0027] Labels for each item in the figure:

[0028] 1. Upper housing; 11. Arc groove; 12. Embedded groove; 2. Lower housing; 21. Protrusion; 3. Fastening cylinder; 31. Raised step; 4. Receiving cavity; 5. Vibrator mechanism; 51. Base plate; 52. Vibration groove; 53. Spring; 54. Coil; 55. Magnet; 6. Diaphragm; 61. Concave step; 62. Recessed part; 63. Demagnetizing sheet; 7. Connecting tube; 8. Controller; 81. Power supply; 82. Control board; 83. Button. Detailed Implementation

[0029] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application. Similarly, the following examples are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] This application proposes improvements and innovations, and presents the following embodiments.

[0036] In some implementations, please refer to Figures 1 to 3 An integrated bone conduction hybrid sound generation device is provided, comprising:

[0037] The upper shell 1 is connected to the lower shell 2 at its lower end, and the two are then sealed to form a closed receiving cavity 4.

[0038] The fastening tube 3 is disposed inside the receiving cavity 4, and the lower part of the fastening tube 3 has a raised step 31 along its outer periphery;

[0039] Vibration mechanism 5, which is located inside the fastening cylinder 3;

[0040] The diaphragm 6 is sealed to the end of the lower housing 2 away from the upper housing 1. The diaphragm 6 has a concave step 61 along its outer periphery that fits into the convex step 31, so that the diaphragm 6 is connected and fixed to the fastening cylinder 3.

[0041] The upper housing 1 and lower housing 2 are assembled by snap-fit, and the connection is sealed after they are snapped together as a single structure. The vibrator mechanism 5 is first installed in the snap-fit ​​cylinder 3, and then the snap-fit ​​cylinder 3 is installed in the receiving cavity 4. The lower housing 2 has an opening at the end away from the upper housing 1, facing the ear canal. The diaphragm 6 is installed at the opening and is sealed to the lower housing 2. The lower part of the snap-fit ​​cylinder 3 has a raised step 31 along its outer periphery, and the diaphragm 6 has a concave step 61 along its outer periphery that fits into the raised step 31, so that the diaphragm 6 is connected and fixed to the snap-fit ​​cylinder 3, thereby achieving the sealing of the entire unit.

[0042] An acoustic cavity is formed between the snap-fit ​​cylinder 3 and the diaphragm 6. After receiving the audio electrical signal, the vibrator mechanism 5 converts the signal into periodic mechanical vibration through electromagnetic induction. The vibration is transmitted to the ossicles through the diaphragm 6 and the ear canal, realizing the function of air-to-sound transmission. The upper and lower shells 2 are fitted together in the concha cavity, and the vibration of the shells is transmitted to the temporal bone through the concha cavity, realizing the function of bone-to-sound transmission. The diaphragm 6 is made of silicone film material, which has the characteristics of being easily vibrated and flexible. The sound effect is best when the thickness of the diaphragm 6 material is in the range of 0.1mm-1.0mm.

[0043] Traditional bone conduction has weak reproduction capabilities for mid-to-high frequencies and insufficient low-frequency performance. The sound transmitted by vibration lacks the layering and detail provided by air conduction, resulting in a thin and distorted overall sound quality. In this application, the vibrator mechanism 5 is located within a completely sealed acoustic cavity. When powered on, it vibrates up and down, utilizing the vibration characteristics of bone conduction combined with acoustic cavity resonance to generate mid-to-high frequency sounds. Furthermore, the internal air vibration compresses and drives the diaphragm 6 to emit mid-to-low frequencies, thus solving the problem of insufficient low-frequency response in bone conduction and achieving near-full-range sound quality. Simultaneously, the fully sealed structure not only solves the sound quality deficiencies of traditional bone conduction but also achieves IP68 waterproof and dustproof ratings in the bone-air dual-transmission mode.

[0044] In addition, the diaphragm 6 of this application can produce a powerful low-frequency effect by vibrating, greatly reducing the damage of air to the eardrum and achieving the effect of not being tired after listening for a long time.

[0045] In one embodiment, the inner wall of the upper housing 1 is provided with an arc groove 11 along its circumference that matches the upper end of the fastening cylinder 3, so that the upper end of the fastening cylinder 3 can abut against the arc groove 11. The matching abutment between the arc groove and the upper end of the fastening cylinder 3 can increase the contact area through curved surface fitting. The groove forms a 360° circumferential restraint on the fastening cylinder 3, which can constrain the radial displacement of the fastening cylinder 3 during vibration. At the same time, the flexible adaptability of the arc shape allows for small tolerances during assembly, which not only ensures the stable positioning of the fastening cylinder 3 in the cavity, but also reduces the precision requirements of production assembly.

[0046] In one embodiment, the inner wall of the upper housing 1 has a groove 12 along its circumference, and the inner side of the lower housing 2 near the upper housing 1 has a protrusion 21 that matches the groove 12. The protrusion 21 is engaged in the groove 12, and the connection seam between the upper housing 1 and the lower housing 2 away from the protrusion 21 is sealed. When the protrusion 21 is engaged in the groove 12, circumferential alignment is achieved through geometric interlocking, avoiding misalignment during the assembly of the upper and lower housings 2, ensuring the relative positional accuracy of core components such as the internal snap-fit ​​cylinder 3 and the vibration mechanism. The snap-fit ​​design facilitates the assembly of the upper and lower housings 2, reduces assembly difficulty, reduces the labor load of workers, and saves time and effort. The upper shell 1 and the lower shell 2 are sealed at the joint away from the protrusion 21 to ensure the airtightness of the cavity 4 and provide a stable acoustic boundary for the mechanical vibration of the vibrator mechanism 5. On the one hand, it reduces the ineffective scattering of vibration to the outside of the cavity. On the other hand, the air in the sealed space can serve as the transmission medium for air-conducting sound waves. When the vibrator mechanism 5 drives the air in the cavity to vibrate, it can form a purer low-frequency air-conducting sound wave (reducing external noise interference), making up for the shortcomings of bone conduction in terms of natural low frequency deficiency and improving the fullness of sound quality.

[0047] In one embodiment, the vibrator mechanism 5 includes a base plate 51 and a vibration groove 52 disposed below the base plate 51. The base plate 51 abuts against the fastening cylinder 3 via a step at the upper end of the inner wall of the fastening cylinder 3. The vibration groove 52 is connected to the inner wall of the fastening cylinder 3 via a spring piece 53. A coil 54 is provided at the lower end of the base plate 51, and a magnet 55 is provided inside the vibration groove 52. The magnet 55 extends partially into the coil 54 along its height direction. When an audio electrical signal is received, the base plate 51 and the coil 54 generate an alternating magnetic field, which generates periodic repulsive / attractive forces with the magnet 55 in the vibration groove 52. This drives the base plate 51 and the vibration groove 52 to reciprocate at high frequencies under the constraint of the elastic restoring force of the spring piece 53, thereby emitting mid-to-high frequency sounds through resonance combined with the sealed acoustic cavity.

[0048] In one embodiment, the inner wall of the snap-fit ​​cylinder 3 is provided with a slot along its circumference to engage with the spring piece 53, so that the spring piece 53 is snapped into the slot. The slot limits the spring piece 53 through circumferential engagement, ensuring that the spring piece 53 is always on a preset vibration trajectory. The magnet 55 is fixed by the spring piece 53, and with the coil 54 connected, the magnet 55 vibrates up and down after being energized. Since it is in a sealed cavity, the vibration compresses the air, and at the same time drives the diaphragm 6 to vibrate to generate low frequency, thus solving the problem of insufficient low frequency in bone conduction.

[0049] In one embodiment, the diaphragm 6 extends along the direction of the vibration groove 52 to form a recess 62, and a demagnetizing sheet 63 is provided on the outer side of the recess 62. The demagnetizing sheet 63 eliminates magnetic field interference, ensures vibration purity, improves sound quality and energy efficiency, and enhances high-frequency details. By stabilizing the magnetic field, the demagnetizing sheet 63 makes the vibration of the voice coil on the diaphragm 6 more precise, reduces transient response delay, and improves high-frequency resolution (such as sibilance in human voices and overtones in musical instruments).

[0050] In one embodiment, the recess 62 has a gap with the bottom of the vibration groove 52.

[0051] In one embodiment, the upper housing 1 has a hole at the end away from the lower housing 2, and a detachable connecting pipe 7 is installed inside the hole. A controller 8 is detachably connected to the end of the connecting pipe 7 away from the upper housing 1. The controller 8 contains a mobile power supply 81 and a control board 82, which are electrically connected. The mobile power supply 81 acts as an independent power source, providing stable power to the entire system through the control board 82. The design of the detachable connecting pipe 7 and the controller 8 allows for the physical separation and rapid assembly of the sound unit and control module, reducing operational difficulty and labor intensity.

[0052] In one embodiment, the controller has an external button 83, which is electrically connected to the control board 82. Users can use the button 83 to perform operations such as power on / off, volume adjustment, and mode switching. The control board 82 receives the signal from the button 83 and immediately adjusts accordingly, allowing the device to adapt to different scenario requirements.

[0053] In one embodiment, substrate 51 is electrically connected to control board 82. Through this electrical connection with substrate 51, audio electrical signals are accurately transmitted to coil 54 on substrate 51.

[0054] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. Although embodiments of this utility model have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this utility model. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this utility model.

Claims

1. An integrated bone conduction hybrid sound generation device, characterized in that, include: The upper housing is fitted with the lower housing at its lower end, and the two are then sealed to form a closed receiving cavity. A fastening tube is disposed in the receiving cavity, and a raised step is provided along its outer periphery at the lower part of the fastening tube; A vibrating element mechanism, wherein the vibrating element mechanism is disposed within the fastening cylinder; A diaphragm is sealed to the end of the lower housing away from the upper housing. The diaphragm has a concave step along its outer periphery that fits into the convex step, so that the diaphragm is connected and fixed to the fastening cylinder.

2. The hybrid sound-generating device according to claim 1, characterized in that, The inner wall of the upper housing is provided with an arc groove along its circumference that matches the upper end of the fastening cylinder, so that the upper end of the fastening cylinder can abut against the arc groove.

3. The hybrid sound-generating device according to claim 1 or 2, characterized in that, The inner wall of the upper housing is provided with a groove along its circumference, and the inner side of the lower housing near the upper housing is provided with a protrusion that matches the groove so that the protrusion is engaged in the groove. The upper housing and the lower housing are sealed together at the joint away from the protrusion.

4. The hybrid sound-generating device according to claim 1, characterized in that, The vibrator mechanism includes a base plate and a vibration groove disposed below the base plate. The base plate abuts against the fastening cylinder through a step at the upper end of the inner wall of the fastening cylinder. The vibration groove is connected to the inner wall of the fastening cylinder through a spring piece. A coil is provided at the lower end of the base plate, and a magnet is provided in the vibration groove. The magnet extends partially into the coil along its height direction.

5. The hybrid sound-generating device according to claim 4, characterized in that, The inner wall of the fastening cylinder is provided with a groove along its circumference to engage with the spring piece, so that the spring piece is engaged in the groove.

6. The hybrid sound-generating device according to claim 4, characterized in that, The diaphragm extends in the center along the direction of the vibration groove to form a recess, and a demagnetizing sheet is provided on the outer side of the recess.

7. The hybrid sound-generating device according to claim 6, characterized in that, The recessed portion has a gap with the bottom of the vibration groove.

8. The hybrid sound-generating device according to claim 6, characterized in that, The upper housing has a hole at one end away from the lower housing. A connecting pipe is detachably installed in the hole. A controller is detachably connected to the end of the connecting pipe away from the upper housing. The controller contains a power supply and a control board. The power supply and the control board are electrically connected.

9. The hybrid sound-generating device according to claim 8, characterized in that, The controller has buttons on its exterior, and the buttons are electrically connected to the control board.

10. The hybrid sound-generating device according to claim 8, characterized in that, The substrate is electrically connected to the control board.

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