Bone conduction musical vibrator and listening and massage integrated car seat headrest
By integrating a bone conduction vibration transducer with a car seat headrest, along with an audio processor and intelligent sensing module, intelligent switching between listening and massage functions is achieved. This solves the problems of single function and redundant equipment in existing technologies, and improves the intelligence and comfort of in-vehicle equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 重庆宏汇汽车部件有限公司
- Filing Date
- 2026-04-14
- Publication Date
- 2026-06-16
AI Technical Summary
Existing bone conduction rhythm oscillators have limited functionality and cannot achieve the integration of listening and massage in a vehicle setting, increasing the installation space and cost of the equipment, while also failing to meet the personalized needs of multiple passengers.
By combining a bone conduction vibration transducer with a car seat headrest, and integrating an audio processor and an intelligent sensing and control module, the system achieves intelligent switching and integration of listening and massage functions. The audio processor switches modes to realize listening and massage functions on a single device, and the intelligent sensing module automatically adjusts the mode according to the occupant and vehicle status.
It achieves both listening and massage functions on a single device, reducing the number of devices and installation space, meeting personalized needs, improving driving comfort and intelligence, and reducing costs.
Smart Images
Figure CN122227159A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive parts technology, and in particular to a bone conduction vibration transducer and an integrated car seat headrest that combines hearing and massage. Background Technology
[0002] In recent years, car users have increasingly sought a premium driving experience, leading to higher demands for in-car entertainment systems. Currently, most mainstream in-car music playback systems rely on external speakers, making it difficult to select music that suits everyone's preferences when there are many passengers. Furthermore, it fails to cater to the diverse needs of passengers, especially when some want to listen to music while others don't. Bone conduction technology, a novel sound transmission method, converts sound into mechanical vibrations of different frequencies, transmitting sound waves sequentially through the skull, bony labyrinth, inner ear fluid, cochlea, auditory nerve, and auditory center. Compared to traditional sound transmission methods that use diaphragms, bone conduction eliminates many of these transmission steps, enabling clear sound reproduction even in noisy in-car environments. The sound waves do not diffuse in the air, preventing interference with other passengers and effectively solving the drawbacks of external music playback in in-car settings. Currently, bone conduction devices used in automotive applications are mainly bone conduction rhythm transducers, whose core function is to transmit sound via bone conduction to meet users' personalized listening needs. However, existing bone conduction rhythm transducers have relatively limited functionality, only enabling simple listening and failing to expand to include more practical functions suitable for automotive scenarios. Meanwhile, with increasing driving time, drivers and passengers maintain a fixed sitting posture for extended periods, easily leading to muscle tension and soreness. In existing automotive devices, listening and massage devices are independent; to achieve massage functionality, a dedicated automotive massage device is required, increasing installation space and user costs. Furthermore, these independent devices cannot work together, making it difficult to achieve an integrated "listening + massage" experience and failing to fully meet the comprehensive comfort needs of drivers and passengers in the vehicle. Summary of the Invention
[0003] To address the problems existing in the prior art, the present invention aims to provide a bone conduction vibration transducer and an integrated car seat headrest for hearing and massage, combining the bone conduction transducer with the car seat headrest to achieve integrated hearing and massage functions, thereby improving the user experience of drivers and passengers, reducing usage costs, and saving vehicle installation space.
[0004] To achieve the above objectives, this invention proposes a bone conduction rhythmic transducer, comprising a transducer body and an audio processor. The transducer body includes a transducer housing, which is formed by a lower vibrating shell and a protective shell. Inside the transducer housing are a magnet, a voice coil, a spring, and a vibrating head. The lower vibrating shell has an open top, and the magnet is fixed within its cavity. The spring is installed at the top opening of the lower vibrating shell. The voice coil surrounds the magnet and is fixed to the bottom surface of the spring. The vibrating head is fixed to the top surface of the spring and housed within the cavity of the protective shell. The protective shell has a window at its top for the vibrating head to pass through. The voice coil is connected via a wire... The bone conduction transducer extends through the transducer housing and connects to the audio processor. The audio processor has an interface for interfacing with in-vehicle music equipment and pre-stores a massage sound spectrum, which is a 15-20Hz sine wave. The audio processor is configured with an in-vehicle music equipment connection mode, a massage sound spectrum playback mode, and a non-working mode. When the audio processor is in the in-vehicle music equipment connection mode, the bone conduction transducer can achieve the listening function. When the audio processor switches to the massage sound spectrum playback mode, the bone conduction transducer can output low-frequency vibration to achieve the massage function. When the audio processor switches to the non-working mode, the bone conduction transducer is completely turned off.
[0005] In the above scheme: the massage sound spectrum is an 18Hz sine wave. 18Hz is within the frequency range that the human body perceives during massage, resulting in excellent comfort. At the same time, the 18Hz sound wave is in the blind spot of human hearing, so people will not perceive any sound and will enjoy a comfortable vibration massage.
[0006] In the above scheme: the top of the acoustic vibration lower shell is provided with an annular recess, and the spring is fixed to the annular recess by bolts, which has strong structural stability and is not easy to loosen or fall off.
[0007] In the above solution, both the sound vibrator and the voice coil are bonded and fixed to the spring sheet, which simplifies the assembly process, effectively reduces the use of fasteners, and simplifies the overall structure.
[0008] In the above solution: the lower shell of the sound vibration and the protective shell of the oscillator are bonded and fixed together to form the outer shell of the oscillator. The assembly process is simple and no additional fasteners are required.
[0009] In the above scheme: the spring is made of manganese steel, which has good elasticity and mechanical properties, can achieve high-fidelity audio reproduction in the high-frequency band, and generate powerful vibration in the low-frequency band.
[0010] This invention also proposes an integrated car seat headrest system for listening and massage, including a headrest body, the aforementioned bone conduction rhythm vibrator, and an intelligent sensing and control module. The bone conduction rhythm vibrator is integrated inside the headrest body and distributed on both sides inside the headrest body. The intelligent sensing and control module is connected to an audio processor. The intelligent sensing and control module is used to collect vehicle status and occupant status information, and control the audio processor to switch modes according to the status information, thereby adjusting the working mode of the bone conduction rhythm vibrator.
[0011] In the above solution: the intelligent sensing and control module includes a thin-film pressure sensor, which is installed below the surface of the headrest body that contacts the passenger and is attached to the inside of the leather. It is used to sense the passenger's leaning state, specifically to sense whether the passenger is leaning against the headrest body, so as to realize the "start when leaning against the headrest" seamless interaction.
[0012] In the above solution: when the intelligent sensing and control module senses that a passenger is leaning against the headrest and the in-vehicle music device is on, the intelligent sensing and control module can automatically control the audio processor to switch to the connection mode with the in-vehicle music device; when the intelligent sensing and control module senses that a passenger is leaning against the headrest and the in-vehicle music device is off, the intelligent sensing and control module can automatically control the audio processor to switch to the massage sound spectrum playback mode; when the intelligent sensing and control module does not sense that a passenger is leaning against the headrest, the intelligent sensing and control module can automatically control the audio processor to switch to the non-working mode.
[0013] This design intelligently links the three states of listening, massage, and power off according to the occupant's status and the vehicle's operating conditions, truly realizing an integrated intelligent driving experience of "working when people come and stopping when people leave, listening when you want to listen and massaging when you need to massage," greatly improving the intelligence level and comfort of the headrest system.
[0014] In the above solution: the intelligent sensing and control system connects the headrest system with other systems of the vehicle through at least one of the following buses: vehicle CAN FD, Bluetooth, and WIFI, to achieve real-time data interaction, obtain status information of other systems of the vehicle, and adjust the massage intensity of the vibrator body according to preset rules based on the status information of the system.
[0015] For example, when the vehicle speed changes, the headrest system adjusts the massage intensity according to preset rules to adapt to different driving scenarios. When the vehicle speed is 0~30km / h, the amplitude of the oscillator body is ±5mm; when the vehicle speed is 30~60km / h, the amplitude of the oscillator body is ±3mm; and when the vehicle speed is above 60km / h, the amplitude of the oscillator body is ±2mm.
[0016] The beneficial effects of this invention are:
[0017] 1. This bone conduction vibration transducer switches between in-vehicle music mode and massage sound spectrum mode via an audio processor, simultaneously achieving dual functions of bone conduction listening and low-frequency vibration massage in a single device. The 15-20Hz sine wave massage sound spectrum effectively relieves neck and head muscle tension and fatigue in drivers and passengers, solving the problem of single-function traditional bone conduction devices. 2. Utilizing bone conduction, sound is transmitted through the skull rather than through the air, producing no external noise. This satisfies the personalized listening needs of in-vehicle occupants, avoiding conflicts in music preferences or disturbing others' rest when multiple passengers are traveling, significantly enhancing the in-vehicle audio-visual experience. 3. Integrating listening and massage functions into a single transducer eliminates the need for additional independent massage devices, reducing the number of in-vehicle devices and installation space required, lowering overall vehicle hardware costs and structural complexity, and achieving an integrated "listening + massage" design. 4. The system is equipped with an intelligent sensing and control module that automatically switches operating modes based on vehicle and occupant status, enabling intelligent adjustment of listening, massage, and off states. This makes it more convenient and user-friendly, improving driving comfort and intelligence. 5. The oscillator has a compact structure with a reasonable layout of magnets, voice coils, springs, and sound vibration heads. The vibration transmission is efficient and stable, ensuring clear audio signal reproduction while outputting soft and uniform low-frequency massage vibrations, thus balancing acoustic performance and massage effect. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of a bone conduction oscillator.
[0019] Figure 2 This is a schematic diagram of the explosion of a bone conduction oscillator.
[0020] Figure 3 This is a schematic diagram showing the bonding of the vibrating head, voice coil, and spring.
[0021] Figure 4 This is a schematic diagram of the bone conduction oscillator arrangement inside the headrest. Detailed Implementation
[0022] like Figure 1 As shown in Figure 3, a bone conduction rhythm oscillator mainly consists of an oscillator body and an audio processor.
[0023] The oscillator body includes an oscillator shell, which is composed of a lower acoustic shell 1 and an oscillator protective shell 2.
[0024] The oscillator housing contains a magnet 3, a voice coil 4, a spring 5, and a sound vibration head 6. The top of the lower sound vibration shell 1 is open. The magnet 3 is fixed inside the cavity of the lower sound vibration shell 1. The spring 5 is installed at the top opening of the lower sound vibration shell 1. The voice coil 4 is arranged around the magnet 3 and fixed to the bottom surface of the spring 5. The sound vibration head 6 is fixed to the top surface of the spring 5 and housed in the cavity of the oscillator protective shell 2. The top of the oscillator protective shell 2 has a window for the sound vibration head 6 to pass through.
[0025] The voice coil 4 passes through the oscillator housing via a wiring harness and is connected to the audio processor. The audio processor has an interface for interfacing with in-vehicle music equipment and has a pre-stored massage sound spectrum, which is a 15-20Hz sine wave.
[0026] The audio processor is equipped with a connection mode for in-vehicle music devices, a massage sound spectrum playback mode, and a non-working mode. When the audio processor is in the connection mode for in-vehicle music devices, the bone conduction rhythm vibrator A can realize the listening function. When the audio processor switches to the massage sound spectrum playback mode, the bone conduction rhythm vibrator A can output low-frequency vibration to realize the massage function. When the audio processor switches to the non-working mode, the bone conduction rhythm vibrator A is completely turned off.
[0027] Ideally, the massage sound spectrum should be a sine wave at 18Hz. 18Hz is within the frequency range that the human body can perceive during massage, resulting in excellent comfort. At the same time, the sound waves emitted at 18Hz are in the blind spot of human hearing, so people will not perceive any sound and can only enjoy the comfortable vibration massage.
[0028] Ideally, the top of the lower housing 1 of the sound vibration is provided with an annular recess, and the spring piece 5 is fixed to the annular recess by bolts, which has strong structural stability and is not easy to loosen or fall off.
[0029] Ideally, both the sound vibrator 6 and the voice coil 4 should be bonded and fixed to the spring 5. This simplifies the assembly process, effectively reduces the use of fasteners, and simplifies the overall structure.
[0030] Ideally, the lower housing 1 and the oscillator protective housing 2 are bonded and fixed together to form the outer shell of the oscillator. The assembly process is simple and requires no additional fasteners.
[0031] Ideally, spring 5 should be made of manganese steel. Manganese steel springs have good elasticity and mechanical properties, enabling high-fidelity audio reproduction in the high-frequency range and generating powerful vibrations in the low-frequency range.
[0032] like Figure 4 As shown, an integrated car seat headrest system combining hearing and massage is mainly composed of a headrest body, an intelligent sensing and control module, and the aforementioned bone conduction rhythm vibrator A.
[0033] Bone conduction rhythm vibrator A is integrated inside the headrest body and distributed on both sides of the headrest body. The intelligent sensing and control module is connected to the audio processor. The intelligent sensing and control module is used to collect vehicle status and occupant status information, and controls the audio processor to switch modes according to the status information, thereby adjusting the working mode of bone conduction rhythm vibrator A.
[0034] Specifically, the intelligent sensing and control module includes a thin-film pressure sensor, which is installed under the surface of the headrest body that contacts the passenger and is attached to the inside of the leather. It is used to sense the passenger's leaning state, specifically to sense whether the passenger is leaning against the headrest body, so as to realize the "start when leaning against the headrest" seamless interaction.
[0035] When the intelligent sensing and control module detects that a passenger is leaning against the headrest and the in-vehicle music system is on, it automatically controls the audio processor to switch to connection mode with the in-vehicle music system. When the intelligent sensing and control module detects that a passenger is leaning against the headrest and the in-vehicle music system is off, it automatically controls the audio processor to switch to massage sound spectrum playback mode. When the intelligent sensing and control module does not detect a passenger leaning against the headrest, it automatically controls the audio processor to switch to non-operating mode. This design intelligently links the three states—listening, massage, and off—based on the occupant's status and vehicle operating conditions, truly achieving an integrated intelligent driving experience of "working when people are present, stopping when people leave, listening when desired, and massaging when needed," significantly improving the intelligence and comfort of the headrest system. The audio processor can also connect to a mobile phone via Bluetooth, allowing users to play audio from their phone, replacing the in-vehicle entertainment system.
[0036] Ideally, the intelligent sensing and control system should connect the headrest system with other systems in the vehicle via at least one of the following buses: vehicle CAN FD, Bluetooth, or WIFI. This would enable real-time data interaction, allowing the system to obtain status information from other vehicle systems and adjust the massage intensity of the vibrator body according to preset rules based on that system status information.
[0037] For example, when the vehicle speed changes, the headrest system adjusts the massage intensity according to preset rules to adapt to different driving scenarios. When the vehicle speed is 0~30km / h, the amplitude of the oscillator body is ±5mm; when the vehicle speed is 30~60km / h, the amplitude of the oscillator body is ±3mm; and when the vehicle speed is above 60km / h, the amplitude of the oscillator body is ±2mm.
Claims
1. A bone conduction rhythmic oscillator, comprising an oscillator body and an audio processor, characterized in that: The oscillator body includes an oscillator shell, which is formed by a lower vibrating shell (1) and an oscillator protective shell (2). Inside the oscillator shell, there is a magnet (3), a voice coil (4), a spring (5), and a vibrating head (6). The top of the lower vibrating shell (1) is open. The magnet (3) is fixed in the cavity of the lower vibrating shell (1). The spring (5) is installed at the top opening of the lower vibrating shell (1). The voice coil (4) is arranged around the magnet (3) and fixed to the bottom surface of the spring (5). The vibrating head (6) is fixed to the top surface of the spring (5) and housed in the cavity of the oscillator protective shell (2). The top of the oscillator protective shell (2) has a window for the vibrating head (6) to pass through. (4) The transducer housing is connected to the audio processor through a wire harness. The audio processor is provided with an interface for docking with the in-vehicle music device and has a massage sound spectrum pre-stored on it. The massage sound spectrum is a sine wave of 15-20Hz. The audio processor is configured with a connection mode with the in-vehicle music device, a massage sound spectrum playback mode and a non-working mode. When the audio processor is in the connection mode with the in-vehicle music device, the bone conduction rhythm transducer (A) can realize the listening function. When the audio processor switches to the massage sound spectrum playback mode, the bone conduction rhythm transducer (A) can output low frequency vibration to realize the massage function. When the audio processor switches to the non-working mode, the bone conduction rhythm transducer (A) is completely turned off.
2. The bone conduction rhythm oscillator according to claim 1, characterized in that: The massage sound spectrum is a 18Hz sine wave.
3. The bone conduction rhythm oscillator according to claim 1, characterized in that: The top of the acoustic lower shell (1) is provided with an annular recess, and the spring piece (5) is fixed to the annular recess by bolts.
4. The bone conduction rhythm oscillator according to claim 1, characterized in that: The sound vibration head (6) and the voice coil (4) are both bonded and fixed to the spring sheet (5).
5. The bone conduction rhythm oscillator according to claim 1, characterized in that: The lower shell (1) of the sound vibration and the protective shell (2) of the oscillator are bonded and fixed together to form the outer shell of the oscillator.
6. The bone conduction rhythm oscillator according to claim 1, characterized in that: The spring (5) is made of manganese steel.
7. A car seat headrest system integrating sound and massage, comprising a headrest body, characterized in that: It also includes the bone conduction rhythm vibrator (A) as described in claims 1-6, and an intelligent sensing and control module. The bone conduction rhythm vibrator (A) is integrated inside the headrest body and distributed on both sides inside the headrest body. The intelligent sensing and control module is connected to the audio processor. The intelligent sensing and control module is used to collect vehicle status and occupant status information, and control the audio processor to switch modes according to the status information, thereby adjusting the working mode of the bone conduction rhythm vibrator (A).
8. The integrated car seat headrest system for hearing and massage according to claim 7, characterized in that: The intelligent sensing and control module includes a thin-film pressure sensor, which is installed below the surface of the headrest body that contacts the passenger and is attached to the inside of the leather to sense the passenger's leaning state.
9. The integrated car seat headrest system for hearing and massage according to claim 7, characterized in that: When the intelligent sensing and control module detects that a passenger is leaning against the headrest and the in-vehicle music device is on, the intelligent sensing and control module can automatically control the audio processor to switch to the connection mode with the in-vehicle music device; when the intelligent sensing and control module detects that a passenger is leaning against the headrest and the in-vehicle music device is off, the intelligent sensing and control module can automatically control the audio processor to switch to the massage sound spectrum playback mode; when the intelligent sensing and control module does not detect that a passenger is leaning against the headrest, the intelligent sensing and control module can automatically control the audio processor to switch to the non-working mode.
10. The integrated car seat headrest system for hearing and massage according to claim 7, characterized in that: The intelligent sensing and control system connects the headrest system with other systems in the vehicle through at least one of the following buses: vehicle CAN FD, Bluetooth, and WIFI. This enables real-time data interaction to obtain status information of other vehicle systems and adjust the massage intensity of the vibrator body according to preset rules based on the system status information.