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

Abstract

The utility model discloses an active and passive combined type low-frequency enhanced bone conduction vibrator, which comprises a shell and a passive elastic sheet, the passive elastic sheet is embedded in a slotted hole formed in the shell, and the bottom of the passive elastic sheet 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] This utility model relates to the field of bone conduction oscillator technology, and in particular to a passive-active composite low-frequency enhanced bone conduction oscillator. Background Technology

[0002] Bone conduction oscillators work by directly converting audio electrical signals into vibration signals. These vibration signals are then transmitted through the skull to the inner ear, stimulating the auditory nerve and allowing the person to perceive sound. This process bypasses the outer and middle ear, achieving direct sound transmission. Existing bone conduction oscillator systems basically meet the requirements, but there are still some shortcomings. The oscillator system of existing bone conduction oscillators uses a single spring structure to control the vibrating block. The vibration mass of the vibration system cannot be too large. On the one hand, if the vibration mass is too large, the output power will be too high, which can easily lead to noise and other defects, and the output power will not be high enough. On the other hand, if the vibration mass is too large, the mid and high frequencies will be severely insufficient, which is detrimental to the sound quality. Therefore, it is necessary to design a composite active and passive low-frequency enhanced bone conduction oscillator. Utility Model Content

[0003] The purpose of this invention is to provide a composite active-passive low-frequency enhanced bone conduction oscillator to solve the defects of existing oscillator systems, such as noise, low output power, and severe deficiency of mid-to-high frequencies when the vibration mass is too large, which is detrimental to sound quality.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a composite active-passive low-frequency enhanced bone conduction oscillator, comprising:

[0005] The outer casing has slots at its top and bottom.

[0006] A passive spring is embedded in a slot on the top of the housing, and a passive magnet is fixedly connected to the bottom of the passive spring.

[0007] An active spring is embedded in a slot on the inner side of the mounting housing, and a magnetic circuit U-cup is fixedly connected to the active spring.

[0008] The magnetic circuit system includes a first magnet, a washer, and a voice coil. The magnetic circuit U-cup is fixedly connected to the first magnet. The bottom of the first magnet is fixedly connected to the washer. The washer and the first magnet are sleeved on the inner side of the voice coil. The voice coil is fixedly connected to the bottom shell. The bottom shell is embedded in a slot at the bottom of the outer shell.

[0009] The top shell is embedded in a slot on the top of the outer shell and is in close contact with the passive spring.

[0010] The active spring and magnetic circuit system constitute the main vibration system, which is used to output medium and high frequency vibration signals; the passive spring and passive magnet constitute the passive vibration system, whose resonant frequency is lower than that of the main vibration system, and is used to output low frequency vibration signals.

[0011] As a further technical solution, the resonant frequency of the passive vibration system is enhanced in the low-frequency range of 20Hz to 200Hz by adjusting the elastic modulus and geometry of the passive spring material.

[0012] 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.

[0013] As a further technical solution, the active spring is made of titanium alloy with a thickness of 0.2mm, and its surface is coated with a damping layer to suppress high-frequency noise.

[0014] As a further technical solution, a silicone sealing ring is provided between the outer shell and the bottom shell, and the connection between the top shell and the outer shell is made using ultrasonic welding to reduce vibration energy loss.

[0015] As a further technical solution, the passive magnet is a neodymium iron boron permanent magnet with a magnetic induction intensity of 1.2T to 1.5T to enhance the magnetic field coupling efficiency.

[0016] As a further technical solution, the washer is 0.5mm thick and has a chamfered edge to reduce magnetic leakage in the magnetic circuit.

[0017] As a further technical solution, the top and bottom shells are made of 6061 aluminum alloy and the surface is anodized to improve structural strength and corrosion resistance.

[0018] This utility model provides a composite active-passive low-frequency enhanced bone conduction oscillator, the advantages of which are: the oscillator's magnetic circuit system is composed of a voice coil, a washer, a first magnet, and a U-cup magnetic circuit; the active spring forms the main vibration system; and the passive magnet and passive spring form the passive vibration system. The oscillator is composed of a fixed structure consisting of a top shell, an outer shell, and a bottom shell. When an audio signal passes through the voice coil, a current is generated, which induces a magnetic field with the magnetic circuit formed by the washer, the first magnet, and the U-cup magnetic circuit, causing the active spring to vibrate. When a mid-to-low frequency audio signal is input, the main vibration system vibrates first, and simultaneously, the passive magnet vibrates due to the vibration of the main vibration system. The magnetic field induction resonates with the active spring, while the passive vibration system, being a passive structure unaffected by power, allows its resonant frequency Fo to be designed lower than that of the main vibration system, thus enhancing low frequencies and producing a Hi-Fi level ultra-deep bass effect, enhancing the consumer's music experience. The dual active and passive vibration system effectively solves the problems of ultra-deep bass, power, and the balance of low, mid, and high frequencies in music. The active vibration system outputs mid-to-high frequency vibration signals, while the passive system primarily outputs low-frequency vibration signals, thereby generating low, mid, and high-frequency vibration signals to achieve wideband bone conduction audio signal output and improve overall sound quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural view of Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0022] Figure 3 This is the impedance curve of the oscillator of this utility model.

[0023] In the diagram: 1. Top shell; 2. Outer shell; 3. Bottom shell; 4. Voice coil; 5. Washer; 6. First magnet; 7. Magnetic circuit U-cup; 8. Active spring; 9. Passive magnet; 10. Passive spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Please see the appendix Figure 1 This utility model provides an embodiment of a composite active-passive low-frequency enhanced bone conduction vibrator, comprising a housing 2 and an active spring 8. The active spring 8 is embedded in a slot in the housing 2, and a magnetic circuit U-cup 7 is fixedly connected to the active spring 8. The magnetic circuit U-cup 7 is fixedly connected to a first magnet 6, and a washer 5 is fixedly connected to the bottom of the first magnet 6. The washer 5 and the first magnet 6 are sleeved on the inner side of a voice coil 4, which is fixedly connected to a bottom shell 3. The bottom shell 3 is embedded in a slot in the bottom of the housing 2, and a top shell 1 is embedded in a slot in the top of the housing 2. A silicone sealing ring is provided between the housing and the bottom shell, and the connection between the top shell and the housing is made using ultrasonic welding to reduce vibration energy loss. The washer 0.5mm thick has a chamfered edge to reduce magnetic leakage. The top shell and bottom shell are made of 6061 aluminum alloy with anodized surface treatment to improve structural strength and corrosion resistance.

[0026] Please see the appendix Figure 2 -Appendix Figure 3 This utility model provides an embodiment of a composite active-passive low-frequency enhanced bone conduction oscillator, comprising a housing 2 and a passive spring 10. The passive spring 10 is embedded in a slot in the housing 2, and a passive magnet 9 is fixedly connected to the bottom of the passive spring 10. An active spring 8 is embedded in a slot in the inner side of the housing 2, and a magnetic circuit U-cup 7 is fixedly connected to the active spring 8. The magnetic circuit U-cup 7 is fixedly connected to a first magnet 6, and a washer plate 5 is fixedly connected to the bottom of the first magnet 6. The first magnet 6 is sleeved on the inner side of the voice coil 4, and the voice coil 4 is fixedly connected to the bottom shell 3. The bottom shell 3 is embedded in the slot opened at the bottom of the outer shell 2. The passive spring 10 is tightly attached to the top shell 1, and the top shell 1 is embedded in the slot opened at the top of the outer shell 2. The active spring is made of titanium alloy with a thickness of 0.2mm 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 1.2T to 1.5T to enhance the magnetic field coupling efficiency.

[0027] Specifically, in use, firstly, the magnetic circuit system of the oscillator is composed of the voice coil 4, washer 5, first magnet 6, and magnetic circuit U-cup 7. This, together with the active spring 8, forms the main vibration system. The passive magnet 9 and passive spring 10 form the passive vibration system. The fixed structure consists of the top shell 1, outer shell 2, and bottom shell 3. The bone conduction oscillator is composed of these four main parts. When an audio signal passes through the voice coil 4, a current is generated, which induces a magnetic field with the magnetic circuit formed by the washer 5, first magnet 6, and magnetic circuit U-cup 7, causing the active spring 8 to vibrate. When a mid-to-low frequency audio signal is input, the main vibration system will vibrate first, and at the same time, the passive magnet 9 will generate a magnetic field due to the vibration of the main vibration system. The induction and active spring 8 resonate together. The passive vibration system is a passive structure, unaffected by power. Its resonant frequency Fo can be designed to be lower than that of the main vibration system, thereby enhancing low frequencies and producing a Hi-Fi level super bass effect, enhancing the consumer's music experience. The active and passive dual vibration systems effectively solve the problems of super bass, power, and the balance of low, mid, and high frequencies in music. The active vibration system outputs mid-to-high frequency vibration signals, while the passive system mainly outputs low-frequency vibration signals, thereby generating low, mid, and high frequency vibration signals, realizing the output of wideband bone conduction audio signals, and improving the overall sound quality.

[0028] The resonant frequency of the passive vibration system is adjusted by modifying the elastic modulus and geometry of the passive spring material to enhance the low-frequency range of 20Hz to 200Hz. The magnetic circuit U-cup, the first magnet, and the washer form a closed magnetic circuit. The voice coil wire is wound at a density of 3 to 5 turns per millimeter to accommodate different power input requirements.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An active-passive composite low-frequency enhanced bone conduction vibrator, characterized in that, include: The outer casing (2) has slots at its top and bottom; A passive spring (10) is embedded in a slot at the top of the outer shell (2), and a passive magnet (9) is fixedly connected to the bottom of the passive spring (10). An active spring (8) is embedded in a slot on the inner side of the outer shell (2), and a magnetic circuit U-cup (7) is fixedly connected to the active spring (8). The magnetic circuit system includes 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 washer (5) is fixedly connected to the bottom of the first magnet (6). 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 shell (3). The bottom shell (3) is embedded in the slot at the bottom of the outer shell (2). The top shell (1) is embedded in the slot on the top of the outer shell (2) and is in close contact with the passive spring (10); The active spring (8) and the magnetic circuit system constitute the main vibration system, which is used to output medium and high frequency vibration signals; the passive spring (10) and the passive magnet (9) constitute the passive vibration system, whose resonant frequency is lower than that of the main vibration system, and is used to output low frequency vibration signals.

2. The passive-active compound low-frequency reinforced bone conduction vibrator according to claim 1, characterized in that, The resonant frequency of the passive vibration system is adjusted by the material elastic modulus and geometry of the passive spring (10) to enhance the low frequency range of 20Hz to 200Hz. 3.The passive and active compound low-frequency reinforced bone conduction vibrator according to claim 1, characterized in that, The magnetic circuit U-cup (7) forms a closed magnetic circuit with the first magnet (6) and the washer plate (5). 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 passive-active compound low-frequency reinforced bone conduction vibrator according to claim 1, characterized in that, The active spring (8) 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.

5. The passive-active compound low-frequency reinforced bone conduction vibrator according to claim 1, characterized in that, A silicone sealing ring is provided between the outer shell (2) and the bottom shell (3), and the connection between the top shell (1) and the outer shell (2) is made by ultrasonic welding process to reduce vibration energy loss.

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

7. The passive and active compound low-frequency reinforced bone conduction vibrator according to claim 1, characterized in that, The washer plate (5) has a thickness of 0.5 mm and its edges are chamfered to reduce magnetic leakage. 8.The passive and active compound low-frequency reinforced bone conduction vibrator according to claim 1, characterized in that, The top shell (1) and bottom shell (3) are made of 6061 aluminum alloy and are anodized to improve structural strength and corrosion resistance.

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