A dual-mode conductive loudspeaker and earphone thereof

Abstract

The utility model discloses a kind of dual-mode conduction loudspeaker and its earphone, including shell, vibration transmission sheet is provided in shell, and magnetic circuit system is vibrated to drive it, diaphragm assembly is provided on vibration transmission sheet, vibration transmission sheet has first conduction path in vibration process, and second conduction path;Vibration transmission sheet in first conduction path, vibration energy is transmitted to shell, and bone conduction effect is generated;Vibration transmission sheet in second conduction path, vibration energy is transmitted to diaphragm assembly, and air conduction effect is generated;Wherein, in second conduction path, diaphragm assembly transmits part of acting force generated by vibration to shell, and vibration energy is superimposed to first conduction path.The utility model has compact structure, high efficiency, can realize the effect of air guide and bone guide effect synergistic enhancement.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic conversion technology, and in particular to a dual-modal conductive loudspeaker and its headphones. Background Technology

[0002] Traditional loudspeakers primarily operate on the principle of air conduction, where the vibration of a diaphragm pushes air to generate sound waves, which are then transmitted through the external auditory canal to the eardrum, allowing the listener to hear. These devices are widely used in consumer electronics such as headphones, hearing aids, and mobile phones. However, air conduction is susceptible to environmental noise interference in noisy environments, leading to decreased sound clarity. Furthermore, its effectiveness is significantly reduced for individuals with closed external auditory canals or damaged eardrums. To address these issues, bone conduction technology was developed. Bone conduction loudspeakers transmit sound vibrations directly to the cochlea in the inner ear by placing a vibrating unit close to the skull or skin, bypassing the outer and middle ear. This method effectively avoids environmental noise interference and provides an effective hearing solution for patients with conductive hearing loss. Currently, bone conduction technology is widely used in military communications, professional sports headphones, and hearing aids.

[0003] In existing technologies, air conduction and bone conduction devices are usually designed and used independently. In order to achieve switching or combining the two listening modes, some hybrid listening devices have emerged on the market. These devices integrate an independent air conduction speaker and an independent bone conduction vibrator in the housing. Although this approach can achieve the function, it results in complex device structure, large size, and high cost. Moreover, the two modes may interfere with each other during operation, resulting in low energy utilization efficiency. More importantly, in existing designs, the air conduction path and bone conduction path are basically independent or separated from each other. That is, the vibration energy generated by the bone conduction vibrator and the vibration energy generated by the air conduction speaker are not effectively integrated. This not only wastes energy but may also lead to inconsistency or disconnection in the perception of the two sounds in complex application scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a dual-modal conductive loudspeaker and its headphones, which have a compact structure, high efficiency, and can achieve the synergistic enhancement of air conduction and bone conduction effects.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a dual-mode conductive loudspeaker, including a housing, a transducer plate disposed inside the housing, and a magnetic circuit system for driving its vibration, a diaphragm assembly disposed on the transducer plate, and the transducer plate having a first conduction path and a second conduction path during vibration; The vibration transmission plate transmits vibration energy to the shell in the first transmission path, and generates a bone conduction effect; The vibration plate, in the second transmission path, transmits vibration energy to the diaphragm assembly and generates an air conduction effect; In the second transmission path, the diaphragm assembly transmits part of the force generated by the vibration to the housing and superimposes the vibration energy onto the first transmission path.

[0006] By adopting the above technical solution, a dual-modal working mode of bone conduction and air conduction effects is realized. Vibration energy is simultaneously transmitted to the shell and diaphragm assembly through the vibration plate, allowing users to perceive sound through bone conduction and hear sound through air transmission, thus improving the diversity and applicability of sound conduction. In particular, part of the force in the second conduction path is fed back to the shell and superimposed on the first conduction path, enhancing the strength and quality of the bone conduction effect, realizing the synergistic effect of the two conduction modes, and improving the clarity and overall performance of the sound.

[0007] A further feature of this invention is that the diaphragm assembly includes a vibration bracket and a vibration diaphragm connected to the vibration bracket, the vibration bracket and / or the vibration diaphragm abutting against the housing, and the vibration transmission plate transmits vibration energy to the vibration diaphragm and feeds it back to the housing through the vibration bracket to form the second conduction path.

[0008] By adopting the above technical solution, the energy transfer path is simplified, the conduction efficiency is improved, and the energy loss is reduced.

[0009] A further feature of this invention is that the vibration support includes an outer frame and a central platform, and the vibration diaphragm is placed on the central platform and abuts against the outer frame.

[0010] By adopting the above technical solution, the stability and flatness of the diaphragm during vibration are ensured, while the deformation or displacement of the diaphragm is avoided under the constraint of the outer frame, thereby improving the accuracy and consistency of air-conducted sound and enhancing the durability of the structure.

[0011] A further feature of this invention is that the outer frame and the central platform are spaced apart to form an annular cavity, and the vibrating diaphragm and the vibration transducer respectively constitute the top and bottom walls of the annular cavity.

[0012] By adopting the above technical solutions, unnecessary vibration interference is reduced, acoustic resonance characteristics are optimized, low-frequency response and sound fullness are enhanced, and the quality and efficiency of air-conducted sound are improved.

[0013] A further feature of this invention is that the vibrating diaphragm has a central hole, and the central platform abuts against the lower part of the central hole and covers the central hole.

[0014] By adopting the above technical solution, excessive stress concentration in the diaphragm during vibration is avoided, allowing the sound waves generated by the diaphragm vibration to diffuse outward, thereby improving the transmission of high-frequency sound.

[0015] A further feature of this invention is that the vibrating diaphragm is provided with an arc-shaped protrusion of an annular structure, and the central hole is located in the internal space defined by the contour of the arc-shaped protrusion.

[0016] By adopting the above technical solutions, the rigidity and strength of the diaphragm are enhanced, and the service life of the diaphragm is improved. In addition, the arc-shaped protrusion helps to guide the concentrated propagation of vibration energy, improve the mid-to-high frequency response, reduce distortion, and make the air-conducted sound clearer and more natural.

[0017] A further feature of this invention is that the inner wall of the housing is provided with a first annular step portion and a second annular step portion from top to bottom, the outer frame and the vibration transmission plate are respectively placed on the first annular step portion and the second annular step portion, the outer frame extends toward the second annular step portion and abuts against the vibration transmission plate.

[0018] By adopting the above technical solution, and by setting the first and second annular steps, the outer frame and the vibration transducer are firmly fixed, and precise positioning and installation benchmarks are provided. It also ensures a tight fit between the vibration components and the shell, reduces energy leakage during vibration transmission, improves the stability of bone conduction and air conduction, facilitates glue fixation, simplifies the assembly process, and reduces production costs. In addition, due to the setting of the first and second annular steps, the vibration diaphragm and vibration transducer are tightly fitted to the shell, and water entering the shell is blocked by the vibration diaphragm and vibration transducer, thus achieving a waterproof effect.

[0019] A further feature of this invention is that the magnetic circuit system includes a magnet and a voice coil, the top of the magnet is connected to the transducer plate, and the voice coil is arranged around the outside of the magnet and abuts against the housing.

[0020] By adopting the above technical solution, efficient electro-acoustic conversion is achieved. The magnet drives the vibration transducer to vibrate, and the contact between the voice coil and the housing provides a stable reaction force, ensuring the direct transmission of vibration energy, improving driving efficiency and response speed, and making dual-mode transmission more sensitive and reliable.

[0021] A further feature of this invention is that it includes a bottom cover installed at the bottom of the housing, and a third annular step portion is provided on the inner wall of the housing, wherein the voice coil is confined between the third annular step portion and the bottom cover.

[0022] By adopting the above technical solution and setting a third annular step, the voice coil is limited and fixed, thus avoiding displacement or damage of the voice coil during vibration.

[0023] Another objective of this invention is to provide an earphone having the aforementioned dual-mode conductive speaker, and further comprising a cover covering the outer shell. The cover has an annular protrusion extending toward the shell, the annular protrusion sealingly abutting against the outer frame and forming a conductive space between the diaphragm and the cover. The cover has a sound outlet hole corresponding to the position of the diaphragm, and the sound generated by the diaphragm is transmitted from the sound outlet hole through the conductive space.

[0024] By adopting the above technical solutions, external interference is isolated, the acoustic path is optimized, the air-conducted sound is more concentrated and pure, and the user experience is enhanced.

[0025] In summary, this utility model has the following beneficial effects: 1. A vibration transducer with a first and a second conduction path during vibration is employed. In the first conduction path, the transducer transmits vibrational energy to the housing, generating a bone conduction effect. In the second conduction path, the transducer transmits vibrational energy to the diaphragm assembly, generating an air conduction effect. In the second conduction path, the diaphragm assembly transmits a portion of the force generated by the vibration to the housing and superimposes the vibrational energy onto the first conduction path, achieving a dual-modal operation of bone and air conduction effects. Vibrational energy is simultaneously transmitted to both the housing and the diaphragm assembly via the transducer, allowing users to perceive sound through bone conduction and hear sound through air transmission, enhancing the diversity and applicability of sound transmission. Specifically, a portion of the force in the second conduction path is fed back to the housing and superimposed onto the first conduction path, strengthening the intensity and quality of the bone conduction effect, achieving synergistic effects between the two conduction modes, and improving sound clarity and overall performance. Furthermore, the effective integration of the air and bone conduction paths makes the overall structure more compact.

[0026] 2. The diaphragm assembly includes a vibration support and a vibration diaphragm connected to the vibration support. The vibration transmission plate abuts against the vibration support and the vibration diaphragm. After the vibration transmission plate vibrates, it can directly drive the vibration diaphragm to vibrate, and can also transmit the vibration to the vibration diaphragm through the vibration support to further drive the vibration diaphragm to vibrate, thereby improving the vibration effect of the vibration diaphragm. The vibration transmission plate transmits the vibration energy to the vibration support at the same time, and the vibration support then feeds the vibration energy back to the shell to form a second transmission path, which simplifies the energy transmission path, improves the transmission efficiency, and reduces energy loss.

[0027] 3. A central hole is provided on the diaphragm, and a central platform is placed below the central hole and covers it, thereby sealing the annular cavity and preventing excessive stress concentration on the diaphragm during vibration. This allows the sound waves generated by the diaphragm to diffuse outward, thus improving the transmission of high-frequency sound.

[0028] 4. The diaphragm is equipped with an arc-shaped protrusion with a ring structure. The central hole is located in the internal space defined by the outline of the arc-shaped protrusion, which enhances the rigidity and strength of the diaphragm and improves its service life. In addition, the arc-shaped protrusion helps to guide the concentrated propagation of vibration energy, improves the mid-to-high frequency response, reduces distortion, and makes the air-conducted sound clearer and more natural.

[0029] 5. The inner wall of the shell is provided with a first annular step and a second annular step from top to bottom. The outer frame and the vibration transducer are respectively placed on the first annular step and the second annular step. The outer frame extends towards the second annular step and abuts against the vibration transducer, so that the outer frame and the vibration transducer are firmly fixed and provide a precise positioning and installation benchmark. It can also ensure a tight fit between the vibration component and the shell, reduce energy leakage during vibration transmission, improve the stability of bone conduction and air conduction, facilitate glue fixation, simplify the assembly process, and reduce production costs. In addition, due to the first annular step and the second annular step, the vibration diaphragm and the vibration transducer are tightly fitted to the shell, and water entering the shell will be blocked by the vibration diaphragm and the vibration transducer, thus achieving a waterproof effect.

[0030] 6. A third annular step is provided on the inner wall of the housing, and the voice coil is confined between the third annular step and the bottom cover, thereby limiting and fixing the voice coil and preventing it from shifting or being damaged during vibration. Attached Figure Description

[0031] Figure 1 This is a three-dimensional representation of the present invention. Figure 1 .

[0032] Figure 2 This is a cross-sectional view of the present invention.

[0033] Figure 3 This is a three-dimensional representation of the present invention. Figure 2 .

[0034] In the diagram: 1. Shell; 11. First annular step; 12. Second annular step; 13. Third annular step; 2. Vibration transducer; 3. Magnetic circuit system; 31. Magnet; 32. Magnetic conductor; 33. Voice coil; 400. Annular cavity; 41. Vibration support; 411. Outer frame; 412. Central platform; 42. Diaphragm; 421. Central hole; 422. Arc-shaped protrusion; 5. Bottom cover; 6. Cover; 600. Conduction space; 61. Annular protrusion; 62. Sound outlet. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] A dual-mode conductive loudspeaker, such as Figure 1-3As shown, it includes a housing 1, inside which a vibration plate 2 is disposed, and a magnetic circuit system 3 for driving its vibration. The driving principle is to use the change of current to generate a changing magnetic field, thereby driving the magnetically conductive vibration plate 2 to vibrate. This is existing technology and will not be described in detail here. The vibration plate 2 is provided with a diaphragm assembly. The vibration plate 2 has a first conduction path and a second conduction path during vibration. The vibration plate 2 transmits vibration energy to the shell 1 in the first transmission path and generates bone conduction effect. Specifically, the vibration plate 2 drives the shell 1 to vibrate, and the shell 1 comes into contact with the skull, jawbone and other skeletal structures, thereby transmitting sound directly to the inner ear through the skeletal structure. This is the basic principle of bone conduction effect. The vibration transmission plate 2 transmits vibration energy to the diaphragm assembly in the second transmission path and generates an air conduction effect. Specifically, the vibration transmission plate 2 drives the diaphragm assembly to vibrate, the vibration of the diaphragm assembly drives the air to vibrate and generate sound waves, and the sound waves are conducted through the air. This is the basic principle of the air conduction effect. In the second conduction path, the diaphragm assembly transmits a portion of the force generated by vibration to the housing 1 and superimposes the vibration energy onto the first conduction path. This technical solution achieves a dual-modal operating mode combining bone conduction and air conduction. Vibration energy is simultaneously transmitted to the housing 1 and the diaphragm assembly via the vibration transducer 2, allowing users to perceive sound through bone conduction and hear sound through air transmission, thus enhancing the diversity and applicability of sound conduction. Specifically, a portion of the force in the second conduction path is fed back to the housing 1 and superimposed onto the first conduction path, strengthening the intensity and quality of the bone conduction effect. This achieves synergistic effects between the two conduction modes, improving sound clarity and overall performance.

[0037] Preferably, the diaphragm assembly includes a vibrating support 41 and a vibrating diaphragm 42 connected to the vibrating support 41. The vibrating diaphragm 42 is located on the vibrating support 41. The housing 1 has a hollow cylindrical structure, with its inner wall abutting against the outer wall of the vibrating support 41. The vibration transmitting plate 2 can abut only against the vibrating support 41, causing the vibrating diaphragm 42 located on the vibrating support 41 to vibrate. Alternatively, it can abut against both the vibrating support 41 and the vibrating diaphragm 42. After the vibration transmitting plate 2 vibrates, it can directly drive the vibrating diaphragm 42 to vibrate, and it can also transmit the vibration to the vibrating diaphragm 42 through the vibrating support 41, further driving the vibrating diaphragm 42 to vibrate, thereby improving the vibration effect of the vibrating diaphragm 42. The vibration transmitting plate 2 simultaneously transmits the vibration energy to the vibrating support 41, and the vibrating support 41 then feeds the vibration energy back to the housing 1 to form the second conduction path. Through the above technical solution, the energy transfer path is simplified, the conduction efficiency is improved, and the energy loss is reduced.

[0038] Preferably, the vibration support 41 includes an outer frame 411 and a central platform 412. The diaphragm 42 is placed on the central platform 412 and abuts against the outer frame 411. The outer frame 411 is annular, and its outer wall abuts against the inner wall of the housing 1. The central platform 412 is located at the center of the outer frame 411 and is concentrically arranged. Through the above structural design, the stability and flatness of the diaphragm 42 during vibration are ensured. Under the constraint of the outer frame 411, deformation or displacement of the diaphragm 42 is avoided, thereby improving the accuracy and consistency of air-conducted sound and enhancing the durability of the structure.

[0039] Preferably, the outer frame 411 and the central platform 412 are spaced apart and form a closed annular cavity 400. The diaphragm 42 and the transducer 2 respectively constitute the top and bottom walls of the annular cavity 400. By setting the annular cavity 400, unnecessary vibration interference is reduced, acoustic resonance characteristics are optimized, low-frequency response and sound fullness are enhanced, and the quality and efficiency of air-conducted sound are improved.

[0040] Preferably, the diaphragm 42 has a central hole 421, and the central platform 412 abuts against the lower part of the central hole 421 and covers the central hole 421, thereby sealing the annular cavity 400. By setting the central hole 421, excessive stress concentration is avoided when the diaphragm 42 vibrates, allowing the sound waves generated by the vibration of the diaphragm 42 to diffuse outward, thereby improving the transmission of high-frequency sound. Further explanation is that by setting the central hole 421, the internal and external air pressures of the annular cavity 400 are balanced, reducing the air damping generated by the vibration of the diaphragm 42, making the vibration more sensitive.

[0041] Preferably, the diaphragm 42 is provided with an annular arc-shaped protrusion 422, and the central hole 421 is located in the internal space defined by the contour of the arc-shaped protrusion 422. By providing the arc-shaped protrusion 422, the rigidity and strength of the diaphragm 42 are enhanced, and the service life of the diaphragm 42 is improved. In addition, the arc-shaped protrusion 422 helps to guide the concentrated propagation of vibration energy, improve the mid-to-high frequency response, reduce distortion, and make the air-conducted sound clearer and more natural.

[0042] Preferably, the inner wall of the housing 1 is provided with a first annular step portion 11 and a second annular step portion 12 from top to bottom. The outer frame 411 and the vibration transmission plate 2 are respectively placed on the first annular step portion 11 and the second annular step portion 12. The outer frame 411 extends towards the second annular step portion 12 and abuts against the vibration transmission plate 2. By setting the first annular step portion 11 and the second annular step portion 12, the outer frame 411 and the vibration transmission plate 2 are firmly fixed, and a precise positioning and installation benchmark are provided. Moreover, it can ensure a tight fit between the vibration component and the housing 1, reduce energy leakage during vibration transmission, improve the stability of bone conduction and air conduction, facilitate glue fixation, simplify the assembly process, and reduce production costs. In addition, due to the setting of the first annular step portion 11 and the second annular step portion 12, the vibration diaphragm 42 and the vibration transmission plate 2 are tightly fitted to the housing 1, and water entering the housing will be blocked by the vibration diaphragm 42 and the vibration transmission plate 2, thus achieving a waterproof effect.

[0043] Preferably, the magnetic circuit system 3 includes a magnet 31 and a voice coil 33. The top of the magnet 31 is connected to the vibrating plate 2, and the voice coil 33 is arranged around the outside of the magnet 31 and abuts against the housing 1. Through the above structural design, efficient electro-acoustic conversion is achieved. The process of generating a changing magnetic field by utilizing changes in current is existing technology and will not be explained in detail here. The magnet 31 drives the vibrating plate 2 to vibrate, and the contact between the voice coil 33 and the housing 1 provides a stable reaction force, ensuring the direct transmission of vibration energy, improving driving efficiency and response speed, and making dual-mode conduction more sensitive and reliable. As a preferred embodiment, the magnetic circuit system 3 also includes a magnetic guide plate 32 connected to the bottom of the magnet 31, and the voice coil 33 is arranged around the outside of the magnetic guide plate 32. By setting the magnetic guide plate 32, the magnetic conduction and focusing effects are improved, thereby increasing the efficiency of sound conduction.

[0044] Preferably, the housing 1 also includes a bottom cover 5 installed at the bottom. The bottom cover 5 can be made of metal or non-metal materials. In one preferred embodiment, a flexible circuit board can be attached to the outside of the bottom cover 5, which has two positive terminals and two negative terminals for power connection interfaces to connect external signal lines. In another preferred embodiment, the bottom cover 5 can be directly constructed from a circuit board, which has two positive terminals and two negative terminals for power connection interfaces to connect external signal lines. A third annular step portion 13 is provided on the inner wall of the housing 1, and the voice coil 33 is confined between the third annular step portion 13 and the bottom cover 5. By providing the third annular step portion 13, the voice coil 33 is confined and fixed, preventing the voice coil 33 from shifting or being damaged during vibration.

[0045] An earphone, having a dual-modal conductive speaker as described above, further includes a cover 6 covering the housing 1. The cover 6 has an annular protrusion 61 extending toward the housing 1. The annular protrusion 61 seals against the outer frame 411, forming a conductive space 600 between the diaphragm 42 and the cover 6. The cover 6 has a sound outlet 62 corresponding to the position of the diaphragm 42. The sound generated by the diaphragm 42 is transmitted through the conductive space 600 from the sound outlet 62. By setting the conductive space 600, external interference is isolated, the acoustic path is optimized, the air-conducted sound is more focused and pure, and the user experience is enhanced.

[0046] 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 dual-mode conductive loudspeaker, comprising a housing (1), wherein a vibrating plate (2) is disposed within the housing (1), and a magnetic circuit system (3) for driving its vibration, characterized in that: The vibration plate (2) is provided with a diaphragm assembly, and the vibration plate (2) has a first transmission path and a second transmission path during vibration; The vibration transmission plate (2) transmits vibration energy to the shell (1) in the first transmission path and generates a bone conduction effect; The vibration plate (2) transmits vibration energy to the diaphragm assembly in the second transmission path and generates an air conduction effect; In the second transmission path, the diaphragm assembly transmits part of the force generated by the vibration to the housing (1) and superimposes the vibration energy onto the first transmission path.

2. The dual-mode conductive loudspeaker according to claim 1, characterized in that: The diaphragm assembly includes a vibration bracket (41) and a vibration diaphragm (42) connected to the vibration bracket (41). The vibration bracket (41) and / or the vibration diaphragm (42) abut against the housing (1). The vibration transmission plate (2) transmits vibration energy to the vibration diaphragm (42) through the vibration bracket (41) and feeds it back to the housing (1) to form the second conduction path.

3. A dual-mode conductive loudspeaker according to claim 2, characterized in that: The vibration support (41) includes an outer frame (411) and a central platform (412), and the vibration diaphragm (42) is placed on the central platform (412) and abuts against the outer frame (411).

4. A dual-mode conductive loudspeaker according to claim 3, characterized in that: The outer frame (411) and the central platform (412) are spaced apart and form an annular cavity (400). The vibrating diaphragm (42) and the vibration plate (2) respectively constitute the top wall and bottom wall of the annular cavity (400).

5. A dual-mode conductive loudspeaker according to claim 3 or 4, characterized in that: The diaphragm (42) has a central hole (421), and the central platform (412) abuts against the lower part of the central hole (421) and covers the central hole (421).

6. A dual-mode conductive loudspeaker according to claim 5, characterized in that: The vibrating diaphragm (42) is provided with an arc-shaped protrusion (422) of an annular structure, and the central hole (421) is located in the internal space defined by the outline of the arc-shaped protrusion (422).

7. A dual-mode conductive loudspeaker according to claim 3, characterized in that: The inner wall of the housing (1) is provided with a first annular step portion (11) and a second annular step portion (12) from top to bottom. The outer frame (411) and the vibration transmission plate (2) are respectively placed on the first annular step portion (11) and the second annular step portion (12). The outer frame (411) extends toward the second annular step portion (12) and abuts against the vibration transmission plate (2).

8. A dual-mode conductive loudspeaker according to claim 1, characterized in that: The magnetic circuit system (3) includes a magnet (31) and a voice coil (33). The top of the magnet (31) is connected to the transducer (2), and the voice coil (33) is arranged around the outside of the magnet (31) and abuts against the housing (1).

9. A dual-mode conductive loudspeaker according to claim 8, characterized in that: It also includes a bottom cover (5) installed at the bottom of the housing (1), and a third annular step portion (13) is provided on the inner wall of the housing (1), and the voice coil (33) is confined between the third annular step portion (13) and the bottom cover (5).

10. An earphone comprising a dual-modal conductive loudspeaker as described in any one of claims 1 to 9, characterized in that: It also includes a cover (6) covering the outer shell (1). The cover (6) has an annular protrusion (61) extending toward the shell (1). The annular protrusion (61) is sealed and abuts against the outer frame (411) and forms a conduction space (600) between the diaphragm (42) and the cover (6). The cover (6) has a sound outlet hole (62) corresponding to the position of the diaphragm (42). The sound generated by the diaphragm (42) is transmitted from the sound outlet hole (62) through the conduction space (600).

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