Headrest loudspeaker

Abstract

The utility model discloses a headrest loudspeaker, and relates to the technical field of loudspeakers. The headrest loudspeaker comprises a loudspeaker system and a shell system, the shell system comprises a front balancer, a basin stand and a rear shell which are fixedly connected in sequence, and the middle of the basin stand is hollowed out and used for containing and installing the loudspeaker system; and a sealed independent sound cavity structure is formed among the loudspeaker system, the basin frame and the rear shell. According to the headrest loudspeaker provided by the embodiment of the invention, the acoustic performance of the loudspeaker system can be optimized, the vibration subsystem in the loudspeaker system can be protected and the frequency response of the loudspeaker can be improved while no additional space is occupied, so that the sound effect of a vehicle-mounted sound system and the riding experience of a driver and passengers can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a headrest loudspeaker. Background Art

[0002] Speakers, as the core components of audio equipment, mainly play back sound. The modern automobile industry is developing towards intelligence, personalization, and networking. However, in terms of car audio and video entertainment, the functional layout of car speakers is still the traditional speaker layout. Due to the influence of the car structure, the sound source of the traditional speaker space layout is far away from the ears of the driver and passengers. When the sound reaches the human ear, it is easily affected by external noise interference, so the performance parameters of the speaker installation cannot be controlled, and a better sound quality experience cannot be provided for the driver and passengers on the car.

[0003] In order to improve the noise interference problem, we need to add speakers in the limited space inside the car without encroaching on the space of the driver and passengers. The related technology provides a headrest speaker to change the traditional speaker layout structure and improve the sound quality experience of the whole vehicle. However, if ordinary speakers are installed in the headrest, the performance and sound quality of the speakers will be greatly reduced due to the internal space structure of the headrest.

[0004] Therefore, it is necessary to design a headrest speaker to improve the sound effect of the vehicle audio system and the riding experience of the driver and passengers. Utility Model Content

[0005] The present application provides a headrest speaker for improving the sound effect of a vehicle audio system and the riding experience of a driver and passengers, so as to solve the above-mentioned technical problems.

[0006] The embodiment of the present application provides a headrest speaker, including a speaker system and a housing system, wherein the housing system includes a front balancer, a basin frame and a rear housing that are fixedly connected in sequence, and the middle of the basin frame is hollowed out for accommodating and installing the speaker system;

[0007] A sealed independent sound cavity structure is formed between the speaker system, the basin frame and the rear shell.

[0008] In some embodiments, the speaker system includes a magnetic circuit subsystem and a vibration subsystem;

[0009] The magnetic circuit subsystem includes magnetic conductive sheets, magnetic steel, and U iron pre-buried in the basin frame;

[0010] The vibration subsystem includes a dust cap, a paper cone, a voice coil, and a positioning support.

[0011] In some embodiments, the magnet is a neodymium iron boron magnet and is disposed in the U iron.

[0012] In some embodiments, a plurality of holes are formed on the side of the voice coil to form a perforated skeleton.

[0013] In some embodiments, the headrest speaker also includes a welding piece and a wiring harness assembly pre-buried in the basin frame for connecting the speaker system.

[0014] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0015] A headrest speaker provided in an embodiment of the present application has a front balancer and a rear shell added to the existing speaker. The front balancer is used to optimize the acoustic performance of the speaker system and protect the vibration subsystem in the speaker system. For example, the front balancer can better suppress the frequency peaks and increase the frequency valleys, making the speaker frequency response curve smoother and the sound quality more pleasant. For example, the front balancer can also prevent other components in the headrest from invading the vibration space of the vibration subsystem, causing the speaker to make noise or damage the paper cone. The rear shell is used to form a sealed independent sound cavity structure with the speaker system and the cone frame to improve the frequency response of the speaker. For example, the sealed independent sound cavity structure can eliminate the short circuit of the sound, separate the sound pressure radiated from the front and back of the paper cone, so that the speaker can obtain better low-frequency radiation efficiency, improve the low-frequency response of the speaker, and ensure that the sound quality and performance will not be affected after being installed inside the headrest. For example, the sealed independent sound cavity structure can also reduce the amplitude of the vibration subsystem, reduce the damage to the voice coil, positioning support and paper cone due to large amplitude, avoid the risk of the voice coil, positioning support or paper cone hitting the bottom, and at the same time make the vibration subsystem work in a small amplitude state, and can work better within the linear range, reducing the nonlinear distortion of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of a headrest speaker provided in an embodiment of the present application;

[0017] Figure 2 is a cross-sectional view of a headrest speaker provided in an embodiment of the present application;

[0018] Figure 3 It is an exploded diagram of a headrest speaker provided in an embodiment of the present application.

[0019] Illustration Description:

[0020] 1. Screws; 2. Front balancer; 3. Dust cap; 4. Paper cone; 5. Voice coil; 6. Positioning support; 7. Magnetic plate; 8. Magnet; 9. Basin; 10. Soldering piece; 11. U iron; 12. Rear shell; 13. Wiring harness assembly; 100. Speaker system; 200. Shell system. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0025] See also Figures 1 to 3 As shown, an embodiment of the present application provides a headrest speaker, including a speaker system 100 and a shell system 200 , wherein the speaker system 100 is disposed in an inner space of the shell system 200 .

[0026] The housing system 200 includes a front balancer 2, a basin frame 9, and a rear housing 12. For example, the front balancer 2, the basin frame 9, and the rear housing 12 are all provided with fixed connection positions for fixing the front balancer 2, the basin frame 9, and the rear housing 12 by screws 1. For example, the middle of the basin frame 9 is hollowed out for accommodating and installing the speaker system 100. In this way, the overall volume of the headrest speaker can be reduced, which is convenient for placement in the headrest.

[0027] The speaker system 100 includes a magnetic circuit subsystem and a vibration subsystem. For example, the magnetic circuit subsystem includes a magnetic conductive sheet 7, a magnetic steel 8, and a U iron 11 pre-buried in a basin frame 9, which is used to provide a constant magnetic field for the voice coil 5. The vibration subsystem includes a dust cap 3, a paper cone 4, a voice coil 5, and a positioning support 6, which is used to vibrate under the action of magnetic force after an audio signal is passed through both ends of the voice coil 5 coil, thereby driving the paper cone 4 and the dust cap 3 to vibrate, so as to push the air to produce sound. For example, when the voice coil 5 coil receives a current signal transmitted from an external system, a changing electromagnetic field is generated, and the electromagnetic field is coupled with the magnetic field provided by the magnetic circuit subsystem to generate a thrust that changes up and down, thereby driving the paper cone 4 and the dust cap 3 to push the air to produce sounds of various frequency bands.

[0028] As an example, the headrest speaker further includes a welding piece 10 and a wiring harness assembly 13 pre-buried in the basin frame 9, which are used to connect the speaker system 100. Optionally, the wiring harness assembly 13 includes a connecting sheath, a connecting terminal, a wire, and a sealing plug.

[0029] In the embodiment of the present application, the front balancer 2 is designed through acoustic simulation, which can better suppress the frequency peak and improve the frequency valley, so that the frequency response curve of the speaker is smoother and the sound quality is more pleasant. That is, the front balancer 2 is used to optimize the acoustic performance of the speaker system 100. At the same time, the front balancer 2 is also used to protect the vibration subsystem, for example, to prevent other components in the headrest from invading the vibration space of the vibration subsystem, causing the speaker to emit noise or damage the paper cone 4. In this way, the high-frequency stability of the speaker can be improved.

[0030] It should be noted that the embodiment of the present application can use relevant technologies to perform acoustic simulation design on the front balancer 2 to obtain a front balancer 2 with the above functions. For example, in the acoustic simulation design, the structure of the front balancer 2 is first adjusted, and then an acoustic simulation test is performed to obtain the acoustic performance of the speaker system 100 corresponding to the front balancer 2. Finally, the structure corresponding to the front balancer 2 with better acoustic performance is selected as the structure of the front balancer 2 provided in the embodiment of the present application.

[0031] In the embodiment of the present application, a sealed independent sound cavity structure is formed between the speaker system 100, the basin frame 9 and the rear shell 12, which can eliminate the short circuit of the sound, separate the sound pressure radiated from the front and back of the paper cone 4, so that the speaker can obtain better low-frequency radiation efficiency, improve the low-frequency response of the speaker, and ensure that the sound quality and performance will not be affected after being installed inside the headrest. For example, the embodiment of the present application can also use relevant technologies to perform acoustic simulation design on the rear shell 12 to obtain a rear shell 12 with the above functions.

[0032] As an example, the sealed independent sound cavity structure can also reduce the amplitude of the vibration subsystem, reduce the damage to the voice coil 5, the positioning support 6 and the paper cone 4 due to the large amplitude, avoid the risk of the voice coil 5, the positioning support 6 or the paper cone 4 hitting the bottom, and at the same time make the vibration subsystem work in a small amplitude state, and can work better within the linear range, reducing the nonlinear distortion of the system.

[0033] In some embodiments of the present application, there is an opening on the rear housing 12 for the speaker signal line to be output, and the signal line is connected to the voice coil 5 of the speaker system 100 through the opening, serving as an input channel for the audio electrical signal. After receiving the electrical signal, the speaker system 100 converts it into mechanical energy vibration, pushing the air to make sound. Optionally, the opening is sealed with a rubber sealing plug, which can effectively prevent air short circuit caused by air leakage.

[0034] In some embodiments of the present application, the magnetic circuit subsystem uses high-performance, high-permeability, low-loss materials as the core materials of the loudspeaker magnetic circuit. The internal magnetic design can improve the frequency response sensitivity and reduce the distortion rate while reducing the mass of the loudspeaker. For example, the magnetic steel 8 uses high-performance neodymium iron boron magnetic steel 8 and is arranged in the U iron 11 (i.e., the internal magnetic structure), which can reduce the overall volume and weight of the loudspeaker system 100 so that it can be installed inside the headrest of the car seat.

[0035] In some embodiments of the present application, the voice coil 5 frame of the vibration subsystem is made of a material with higher performance and lighter weight, and adopts a perforated design, in conjunction with the coil and magnetic circuit subsystem, to improve the characteristic sensitivity of the speaker. As an example, the voice coil 5 uses a perforated frame, for example, a plurality of holes are provided on the side of the voice coil 5 to form a perforated frame, which is used to provide a heat dissipation channel for the magnetic gap, and can also improve the heat dissipation capacity of the vibration subsystem and the magnetic circuit subsystem, and improve the life and stability of the speaker.

[0036] The above-mentioned headrest speaker has an acoustically designed independent sound cavity structure and an acoustically designed front balancer 2, so that the performance parameters after installation will not be affected by the internal environment of the headrest, so it has better F0 (resonance frequency), Q value, sensitivity, distortion and other performance parameters.

[0037] The working principle of the headrest speaker in the embodiment of the present application is:

[0038] According to Ferrari's law, when a current-carrying conductor passes through an electromagnetic field, it will be subjected to a point force, the direction of which conforms to Fleming's left-hand rule. The force is perpendicular to the direction of the current and magnetic field, and the magnitude is proportional to the current, the length of the conductor, and the magnetic flux density. When the voice coil 5 inputs an alternating audio current, the voice coil 5 is subjected to an alternating driving force to produce an alternating motion, driving the paper cone 4 to vibrate and repeatedly pushing the air to produce sound.

[0039] In some embodiments of the present application, the headrest speaker can cooperate with the vehicle system to access the navigation system prompt. In this way, different entertainment or navigation prompts can be provided for the driver and passengers through intelligent control. For example, when the navigation system is working, navigation prompts are provided to the driver alone, and the music of other passengers will not be interrupted by the navigation prompts. This has a very good effect on improving the driving and entertainment experience of the whole vehicle.

[0040] In summary, the headrest speaker provided in the embodiment of the present application can improve the sound effect of the vehicle audio system and the riding experience of the driver and passengers without taking up additional space.

[0041] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A headrest speaker, characterized in that: It includes a speaker system and a housing system, wherein the housing system includes a front balancer, a basin frame and a rear housing that are fixedly connected in sequence, and the middle of the basin frame is hollowed out to accommodate and install the speaker system; A sealed independent sound cavity structure is formed between the speaker system, the basin frame and the rear shell.

2. The headrest speaker according to claim 1, characterized in that: The speaker system includes a magnetic circuit subsystem and a vibration subsystem; The magnetic circuit subsystem includes a magnetic conductive sheet, a magnetic steel, and a U iron pre-buried on the basin frame; The vibration subsystem includes a dust cap, a paper cone, a voice coil, and a positioning support.

3. The headrest speaker according to claim 2, characterized in that: The magnetic steel is a neodymium iron boron magnetic steel and is arranged in the U iron.

4. The headrest speaker according to claim 2, characterized in that: A plurality of holes are provided on the side of the voice coil to form a perforated frame.

5. The headrest speaker according to any one of claims 1 to 4, characterized in that: The headrest speaker also includes a welding piece and a wiring harness assembly pre-buried in the basin frame, which are used to connect the speaker system.

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