Active and passive combined type low-frequency enhanced bone conduction vibrator

Abstract

The invention discloses an active and passive combined type low-frequency enhanced bone conduction vibrator which comprises a shell and a passive elastic piece, the passive elastic piece is embedded in a groove hole formed in the shell, and the bottom of the passive elastic piece is fixedly connected with a passive magnet; when an audio signal passes through the voice coil, current is generated, the active elastic piece is driven to vibrate, the passive magnet and the active elastic piece resonate, the passive vibration system is of a passive structure and is not affected by power, and the resonant frequency Fo of the vibration system can be designed to be lower than that of a main vibration system, so that the low-frequency enhancement effect is achieved, and the HIFI-level mega bass effect is generated; the music experience of consumers is improved; through the active-passive dual-vibration system, the problem of balance of mega bass, power and low, medium and high frequencies of music is effectively solved, the active vibration system outputs medium-high frequency vibration signals, the passive system mainly outputs low-frequency vibration signals, output of broadband bone conduction audio signals is achieved, and the overall tone quality effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bone conduction oscillators, and particularly to a main-passive composite low-frequency enhanced bone conduction oscillator. Background Art

[0002] Bone conduction oscillators work by means of bone conduction, that is, directly converting audio electrical signals into vibration signals, which are then transmitted through the skull to the inner ear, thereby stimulating the auditory nerve and enabling people to perceive sound. This process bypasses the outer ear and middle ear, achieving direct transmission of sound; existing bone conduction oscillator systems basically meet the requirements, but there are still certain defects. The oscillator system of existing bone conduction oscillators uses a single shrapnel structure to control the vibration block, and the vibration mass of its vibration system cannot be too large. On the one hand, when the vibration mass is too large and the output power is too large, it is easy to appear abnormal noises, etc., and the output power will not be too large. At the same time, when the vibration mass is too large, the mid-high frequency is seriously insufficient, which is not conducive to the sound quality. Therefore, it is very necessary to design a main-passive composite low-frequency enhanced bone conduction oscillator. Summary of the Invention

[0003] The purpose of the present invention is to provide a main-passive composite low-frequency enhanced bone conduction oscillator to solve the defects that the existing oscillator system is prone to abnormal noises, etc., has a small output power, and the mid-high frequency is seriously insufficient when the vibration mass is too large, which is not conducive to the sound quality.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: A main-passive composite low-frequency enhanced bone conduction oscillator, comprising: A housing, with slot holes opened at the top and bottom of the housing; A passive shrapnel, embedded and installed in the slot hole at the top of the housing, and a passive magnet is fixedly connected to the bottom of the passive shrapnel; An active shrapnel, embedded and installed in the slot hole inside the housing, and a magnetic circuit U-cup is fixedly connected to the active shrapnel; A magnetic circuit system, comprising a first magnet, a washer and a voice coil. The magnetic circuit U-cup is fixedly connected to the first magnet, a washer is fixedly connected to the bottom of the first magnet, the washer and the first magnet are sleeved on the inner side of the voice coil, and the voice coil is fixedly connected to the bottom case, and the bottom case is embedded and installed in the slot hole at the bottom of the housing; A top case, embedded and installed in the slot hole at the top of the housing and closely attached to the passive shrapnel; Wherein, the active shrapnel and the magnetic circuit system form a main vibration system for outputting mid-high frequency vibration signals; the passive shrapnel and the passive magnet form a passive vibration system, and its resonance frequency is lower than that of the main vibration system, for outputting low-frequency vibration signals.

[0005] As a further technical solution, the resonant frequency of the passive vibration system is adjusted by the material elastic modulus and geometric shape of the passive spring piece to enhance the low-frequency band from 20 Hz to 200 Hz.

[0006] As a further technical solution, the magnetic circuit U-cup, the first magnet, and the washer form a closed magnetic circuit, and the wire winding density of the voice coil is 3 to 5 turns per millimeter to adapt to different power input requirements.

[0007] As a further technical solution, the active spring piece is made of titanium alloy with a thickness of 0.2 mm, and its surface is coated with a damping layer to suppress high-frequency noise.

[0008] As a further technical solution, a silicone rubber sealing ring is provided between the outer shell and the bottom shell, and the connection between the top shell and the outer shell adopts ultrasonic welding technology to reduce vibration energy loss.

[0009] As a further technical solution, the passive magnet is a neodymium iron boron permanent magnet with a magnetic induction intensity of 1.2 T to 1.5 T to enhance the magnetic field coupling efficiency.

[0010] As a further technical solution, the washer has a thickness of 0.5 mm, and its edge is provided with a chamfer structure to reduce magnetic leakage in the magnetic circuit.

[0011] As a further technical solution, the top shell and the bottom shell are made of 6061 aluminum alloy, and the surface is anodized to improve the structural strength and corrosion resistance.

[0012] A main-passive composite low-frequency enhanced bone conduction oscillator provided by the present invention has the following advantages: The magnetic circuit system of the oscillator is composed of a voice coil, a washer, a first magnet, and a magnetic circuit U-cup, and cooperates with an active spring piece to form a main vibration system. The passive magnet and the passive spring piece form a passive vibration system. The fixed structure is composed of a top shell, an outer shell, and a bottom shell. The bone conduction oscillator is composed of four major parts; when an audio signal passes through the voice coil, a current is generated, which generates a magnetic field induction with the magnetic circuit composed of the washer, the first magnet, and the magnetic circuit U-cup, driving the active spring piece to vibrate. When a mid-low frequency audio signal is input, the main vibration system will vibrate first. At the same time, the passive magnet will generate magnetic field induction and resonate with the active spring piece due to the vibration of the main vibration system. The passive vibration system is a passive structure and is not affected by power. The resonant frequency Fo of its vibration system can be designed to be lower than that of the main vibration system, thus achieving the effect of low-frequency enhancement and generating an HIFI-level super bass effect, enhancing the music experience of consumers; The problems of its super bass, power, and the balance of the three frequencies of low, middle, and high in music are effectively solved through the main-passive dual vibration system. The active vibration system outputs mid-high frequency vibration signals, and the passive system mainly outputs low-frequency vibration signals, thus generating low, middle, and high frequency vibration signals to achieve the output of broadband bone conduction audio signals and improve the overall sound quality effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a three-dimensional structure diagram of Embodiment 1 in the present invention; Figure 2 It is a schematic structural diagram of Embodiment 2 in the present invention; Figure 3 It is an impedance curve diagram of the oscillator of the present invention.

[0015] In the figure: 1. top shell; 2. outer shell; 3. bottom shell; 4. voice coil; 5. washer; 6. first magnet; 7. magnetic circuit U cup; 8. active elastic piece; 9. passive magnet; 10. passive elastic piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0017] Please refer to the attached Figure 1 , an embodiment provided by the present invention: a main-passive composite low-frequency enhanced bone conduction oscillator, including an outer shell 2 and an active elastic piece 8. The active elastic piece 8 is embedded and installed in a slot hole opened in the outer shell 2. A magnetic circuit U cup 7 is fixedly connected to the active elastic piece 8. The magnetic circuit U cup 7 is fixedly connected to a first magnet 6. The bottom of the first magnet 6 is fixedly connected to a washer 5. The washer 5 and the first magnet 6 are sleeved inside the voice coil 4. The voice coil 4 is fixedly connected to the bottom shell 3. The bottom shell 3 is embedded and installed in a slot hole opened at the bottom of the outer shell 2. A top shell 1 is embedded and installed in a slot hole opened at the top of the outer shell 2; a silica gel sealing ring is provided between the outer shell and the bottom shell, and the connection between the top shell and the outer shell adopts an ultrasonic welding process to reduce vibration energy loss. The thickness of the washer is 0.5 mm, and its edge is provided with a chamfer structure to reduce magnetic circuit leakage. The materials of the top shell and the bottom shell are 60Si61 aluminum alloy, and the surface is subjected to anodic oxidation treatment to improve the structural strength and corrosion resistance.

[0018] Please refer to the attached Figure 2 - attached Figure 3, an embodiment provided by the present invention: a main-passive composite low-frequency enhanced bone conduction oscillator, including a housing 2 and a passive diaphragm 10. The passive diaphragm 10 is embedded and installed in the slot hole opened in the housing 2. A passive magnet 9 is fixedly connected to the bottom of the passive diaphragm 10. An active diaphragm 8 is embedded and installed in the slot hole opened on the inner side of the housing 2. A magnetic circuit U cup 7 is fixedly connected to the active diaphragm 8. The magnetic circuit U cup 7 is fixedly connected to the first magnet 6. A washer plate 5 is fixedly connected to the bottom of the first magnet 6. The washer plate 5 and the first magnet 6 are sleeved on the inner side of the voice coil 4. The voice coil 4 is fixedly connected to the bottom case 3. The bottom case 3 is embedded and installed in the slot hole opened at the bottom of the housing 2. A top case 1 is closely attached to the passive diaphragm 10. The top case 1 is embedded and installed in the slot hole opened at the top of the housing 2; the material of the active diaphragm is titanium alloy, with a thickness of 0.2 mm, and its surface is coated with a damping layer to suppress high-frequency noise. The passive magnet is a neodymium iron boron permanent magnet with a magnetic induction intensity of 1.2 T to 1.5 T to enhance the magnetic field coupling efficiency.

[0019] Specifically, during use, first, a magnetic circuit system of the oscillator is composed of the voice coil 4, the washer plate 5, the first magnet 6 and the magnetic circuit U cup 7, which cooperates with the active diaphragm 8 to form a main vibration system. The passive magnet 9 and the passive diaphragm 10 form a passive vibration system. The fixed structure is composed of the top case 1, the housing 2 and the bottom case 3. The bone conduction oscillator is composed of these four major parts; when an audio signal passes through the voice coil 4, a current is generated, which generates a magnetic field induction with the magnetic circuit composed of the washer plate 5, the first magnet 6 and the magnetic circuit U cup 7, driving the active diaphragm 8 to vibrate. When a medium and low-frequency audio signal is input, the main vibration system will vibrate first. At the same time, the passive magnet 9 will generate magnetic field induction and resonate with the active diaphragm 8 due to the vibration of the main vibration system. The passive vibration system is a passive structure and is not affected by power. The resonance frequency Fo of its vibration system can be designed to be lower than that of the main vibration system, so as to achieve the effect of low-frequency enhancement, produce the effect of HIFI-level heavy bass, and increase the music experience of consumers; the problem of its heavy bass, power and the balance of the three frequencies of low, middle and high in music is effectively solved through the main-passive dual vibration system. The active vibration system outputs medium and high-frequency vibration signals, and the passive system mainly outputs low-frequency vibration signals, so as to generate low, middle and high-frequency vibration signals, realize the output of broadband bone conduction audio signals, and improve the overall sound quality effect.

[0020] The resonance frequency of the passive vibration system is adjusted through the material elastic modulus and geometric shape of the passive diaphragm to achieve the enhancement of the 20 Hz to 200 Hz low-frequency band. The magnetic circuit U cup, the first magnet and the washer plate form a closed magnetic circuit. The wire winding density of the voice coil is 3 to 5 turns per millimeter to adapt to different power input requirements.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A main-passive composite low-frequency enhanced bone conduction oscillator, characterized in that, Comprising: A housing (2), with slots opened at the top and bottom of the housing (2); A passive elastic piece (10), embedded and installed in the slot at the top of the housing (2), and a passive magnet (9) is fixedly connected to the bottom of the passive elastic piece (10); An active elastic piece (8), embedded and installed in the slot inside the housing (2), and a magnetic circuit U cup (7) is fixedly connected to the active elastic piece (8); A magnetic circuit system, including a first magnet (6), a washer (5) and a voice coil (4), the magnetic circuit U cup (7) is fixedly connected to the first magnet (6), the bottom of the first magnet (6) is fixedly connected to the washer (5), the washer (5) and the first magnet (6) are sleeved on the inner side of the voice coil (4), the voice coil (4) is fixedly connected to the bottom case (3), and the bottom case (3) is embedded and installed in the slot at the bottom of the housing (2); A top case (1), embedded and installed in the slot at the top of the housing (2) and in close contact with the passive elastic piece (10); Wherein, the active elastic piece (8) and the magnetic circuit system form a main vibration system for outputting medium and high frequency vibration signals; the passive elastic piece (10) and the passive magnet (9) form a passive vibration system, whose resonance frequency is lower than that of the main vibration system, for outputting low frequency vibration signals.

2. The active and passive composite low-frequency enhanced bone conduction oscillator according to claim 1, wherein The resonance frequency of the passive vibration system is adjusted by the material elastic modulus and geometric shape of the passive elastic piece (10) to enhance the low frequency band from 20 Hz to 200 Hz.

3. The active and passive composite low-frequency enhanced bone conduction oscillator according to claim 1, wherein The magnetic circuit U cup (7), the first magnet (6) and the washer (5) form a closed magnetic circuit, and the wire winding density of the voice coil (4) is 3 to 5 turns per millimeter to adapt to different power input requirements.

4. The active and passive composite low-frequency enhanced bone conduction oscillator according to claim 1, wherein The material of the active elastic piece (8) is titanium alloy, with a thickness of 0.2 mm, and its surface is coated with a damping layer to suppress high frequency noise.

5. The active and passive composite low-frequency enhanced bone conduction oscillator according to claim 1, wherein A silica gel sealing ring is provided between the housing (2) and the bottom case (3), and the connection between the top case (1) and the housing (2) adopts an ultrasonic welding process to reduce vibration energy loss.

6. The active and passive composite low-frequency enhanced bone conduction oscillator according to any one of claims 1 to 5, characterized in that, The passive magnet (9) is a neodymium iron boron permanent magnet, with a magnetic induction intensity of 1.2 T to 1.5 T to enhance the magnetic field coupling efficiency.

7. The active and passive composite low-frequency enhanced bone conduction oscillator according to claim 1, wherein The thickness of the washer (5) is 0.5 mm, and its edge is provided with a chamfer structure to reduce magnetic circuit magnetic leakage.

8. The active and passive composite low-frequency enhanced bone conduction oscillator according to claim 1, wherein The materials of the top case (1) and the bottom case (3) are 6061 aluminum alloy, and the surface is subjected to anodic oxidation treatment to improve the structural strength and corrosion resistance.

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