Vibration assembly for preventing side sound leakage of bone conduction earphone

Abstract

The utility model discloses a bone conduction earphone vibration assembly capable of preventing side sound leakage, which comprises an outer shell, a magnetic circuit assembly, an elastic sheet and a conduction assembly, the outer shell is a cavity with an accommodating space inside, the upper wall of the cavity is provided with a sound outlet hole, the magnetic circuit assembly is provided with a magnetic induction voice coil matched with the magnetic circuit assembly, and the elastic sheet is arranged in the magnetic circuit assembly. The magnetic induction voice coil is arranged at the position of the lower wall of the elastic piece, the lower wall of the conduction assembly is connected with the elastic piece, and the upper wall of the conduction assembly is attached to the top wall of the cavity and is arranged opposite to the sound outlet hole. Firstly, the relatively closed cavity of the outer shell can prevent the generated vibration wave from being transmitted to the external space of the outer shell when the magnetic circuit assembly and the magnetic induction voice coil work, so that primary side leakage sound prevention is realized; when the outer shell is attached to the cochlea, the conduction assembly transmits the vibration waves to the cochlea through the sound outlet hole, so that bundling of the vibration waves is realized, the sound quality of the bone conduction earphone is effectively improved, and distortion of low pitch and high pitch is reduced.

Description

Technical Field

[0001] The utility model relates to the field of bone conduction headphones, and particularly relates to a vibration component for preventing lateral sound leakage of bone conduction headphones. Background Technique

[0002] Bone conduction is a sound conduction method, that is, sound is converted into mechanical vibrations of different frequencies and transmitted through the human skull, bony labyrinth, endolymph of the inner ear, spiral organ, and auditory center.

[0003] Among them, the most important design of the speaker of bone conduction headphones is the oscillator structure, which realizes a predetermined vibration frequency by converting circuit signals. However, in the existing oscillator speakers, since the magnetic circuit component directly drives the vibration component, the vibration component is generally in direct contact with the outer cladding. When the vibration component makes a predetermined vibration frequency, the part of the vibration component in contact with the ear will also generate sound, resulting in sound leakage. The existing method is generally to increase the contact area between the outer cladding and the ear, thereby reducing sound leakage. However, as the area of the headphone increases, the wearing comfort also decreases.

[0004] Especially in some low-cost bone conduction headphone products, the problem of sound leakage often occurs, which is called sound leakage in the acoustic field.

[0005] For example, in Chinese Patent CN2022222998759, through vent holes and damping sheets, its function is to avoid negative pressure in the inner cavity, thereby avoiding affecting the fitting comfort. Utility Model Content

[0006] The main purpose of the present utility model is to propose a vibration component for preventing lateral sound leakage of bone conduction headphones, aiming to form a relatively closed cavity inside the outer shell through the cooperation of the outer shell and the conduction component. When the magnetic circuit component drives the conduction component to vibrate, the vibration wave is concentrated through the sound outlet hole, thereby reducing the problem of sound leakage.

[0007] To achieve the above object, the present utility model proposes a vibration component for preventing lateral sound leakage of bone conduction headphones, including:

[0008] An outer shell, the outer shell is a cavity with an accommodation space inside, and a sound outlet hole is provided on the upper wall of the cavity;

[0009] A magnetic circuit component, the magnetic circuit component is provided with a mutually cooperating magnetic induction sound coil, thereby converting an electrical signal into a vibration frequency of a predetermined frequency;

[0010] A shrapnel, the magnetic induction sound coil is arranged at the lower wall position of the shrapnel;

[0011] The conduction component is made of non-magnetic material. The lower wall of the conduction component is connected to the elastic sheet, and the upper wall of the conduction component is attached to the top wall of the cavity and is disposed opposite to the sound outlet hole.

[0012] In the actual design, firstly, the relatively enclosed cavity of the outer housing can prevent the vibration waves generated during the operation of the magnetic circuit component and the magnetic induction sound coil from being transmitted to the external space of the outer housing, achieving preliminary prevention of sound leakage to the side. When the outer housing is attached to the cochlea, the conduction component transmits the vibration waves to the cochlea through the sound outlet hole, thereby realizing the clustering of the vibration waves, effectively improving the sound quality of the bone conduction headset, and reducing the distortion of bass and treble. Description of the Drawings

[0013] Figure 1 is an exploded view of the present utility model Figure 1 ;

[0014] Figure 2 is an exploded view of the present utility model Figure 2 ;

[0015] Figure 3 is a cross-sectional view of the bone conduction headset.

[0016] In the figure,

[0017] 1 is the outer housing, 10 is the accommodation space, 11 is the base, 12 is the upper cover, 13 is the surrounding part, 14 is the sound outlet hole,

[0018] 2 is the magnetic circuit component,

[0019] 3 is the elastic sheet, 31 is the ring, 32 is the support arm,

[0020] 4 is the magnetic induction sound coil,

[0021] 5 is the conduction component, 51 is the first positioning seat, 52 is the second positioning seat, 53 is the guide post. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] It should be noted that if there are directional indications involved in the embodiments of the present utility model (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present utility model, then such descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0025] As Figures 1 to 3 shown, a vibration assembly for preventing side leakage of sound in a bone conduction headset includes:

[0026] A housing 1, the housing 1 is a cavity with an accommodation space 10 inside, and an sound outlet hole 14 (for guiding and focusing vibration waves) is provided on the upper wall of the cavity;

[0027] A magnetic circuit assembly 2, the magnetic circuit assembly 2 is provided with a mutually cooperating magnetic induction sound coil 4, and further converts an electrical signal into a vibration frequency of a predetermined frequency;

[0028] A shrapnel 3, the magnetic induction sound coil 4 is arranged at the lower wall position of the shrapnel 3;

[0029] A conduction assembly 5, the conduction assembly 5 is made of a non-magnetic material, the lower wall of the conduction assembly 5 is connected to the shrapnel 3, the upper wall of the conduction assembly 5 is attached to the top wall of the cavity and is arranged opposite to the sound outlet hole 14.

[0030] In actual design, first, the relatively closed cavity of the housing 1 can prevent the vibration waves generated during the operation of the magnetic circuit assembly 2 and the magnetic induction sound coil 4 from being transmitted to the external space of the housing 1, achieving preliminary prevention of side leakage of sound; when the housing 1 is attached to the cochlea, the conduction assembly 5 transmits the vibration waves to the cochlea through the sound outlet hole 14, thereby achieving the focusing of the vibration waves, effectively improving the sound quality of the bone conduction headset and reducing the distortion of bass and treble.

[0031] Specifically, the outer housing 1 includes a base 11 with an opening at the upper end and an upper cover 12 detachably installed on the base 11. The upper cover 12 and the base 11 enclose the accommodation space 10. The sound outlet hole 14 is provided on the upper cover 12. The wall surface of the upper cover 12 away from the base 11 is the vibration surface, which facilitates the assembly of the vibrator speaker. The vibration surface is attached to the cochlea, thereby realizing the transmission of sound waves.

[0032] In the embodiment of the present utility model, the sound outlet hole 14 is provided at the middle position of the upper cover 12. The elastic piece 3, the sound outlet hole 14, the magnetic circuit assembly 2, and the magnetic induction sound coil 4 are coaxially arranged and are all elliptical or circular, which can ensure the transmission of vibration waves and facilitate the assembly of the earphone. Products with circular or elliptical shapes are applicable.

[0033] Specifically, a surrounding portion 13 extending downward is provided on the lower wall of the upper cover 12 around the sound outlet hole 14. The upper end of the conduction component 5 extends into the surrounding portion 13 and is suitable for its size. This facilitates the limitation of the second positioning seat 52 and further ensures the clustering of vibration waves, avoiding sound leakage on the side.

[0034] In the embodiment of the present utility model, the conduction component 5 includes a first positioning seat 51 attached to the elastic piece 3, a second positioning seat 52 attached to the lower wall of the upper cover 12, and a guide post 53 provided between the first positioning seat 51 and the second positioning seat 52. The diameter of the guide post 53 is smaller than the diameters of the first positioning seat 51 and the second positioning seat 52. Through the setting of the guide post 53, the conduction component 5 has sufficient length to transmit the vibration generated by the elastic piece 3, so that the vibration meets the predetermined requirements and improves the sound quality effect.

[0035] Specifically, the diameter of the second positioning seat 52 is larger than that of the first positioning seat 51. This can make the vibration transmission more stable. It can be understood that when the first positioning seat 51 generates vibration, the second positioning seat 52 will surely generate vibration. When the area of the first positioning seat 51 is smaller than that of the second positioning seat 52, the vibration amplitude transmitted to the second positioning seat 52 will be amplified, so that the bass and treble are more in line with the predetermined waveform.

[0036] In the embodiment of the present utility model, the cross-section of the conduction component 5 is in the shape of "I", which not only facilitates installation but also realizes the transmission of vibration.

[0037] Specifically, the guide post 53 and the first positioning seat 51 are integrally provided. Of course, a split structure can also be adopted, or the first positioning seat 51, the guide post 53, and the second positioning seat 52 are integrally structured. The upper end of the guide post 53 and the first positioning seat 51 can be fixed by an adhesive method.

[0038] In the embodiment of the present utility model, the guide post 53 is of a hollow structure, which can improve the beamforming of vibration waves and thus reduce the problem of sound leakage.

[0039] Specifically, the elastic sheet 3 includes a circular ring 31 distributed at intervals along the same axis and a support arm 32 connecting two adjacent circular rings. The first positioning seat 51 is connected to the innermost circular ring 31, and the magnetic induction sound coil 4 is connected to the circular ring at the middle position, thereby ensuring the vibration of the conduction assembly 5 at a predetermined frequency.

[0040] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or any direct / indirect application in other related technical fields shall be included in the patent protection scope of the present utility model.

Claims

1. A vibration component for preventing side sound leakage of a bone conduction earphone, characterized in that: include: An outer shell, wherein the outer shell is a cavity with a receiving space inside, and a sound outlet hole is provided on an upper wall of the cavity; A magnetic circuit assembly, wherein the magnetic circuit assembly is provided with a matching magnetic voice coil, thereby converting the electrical signal into a vibration frequency of a predetermined frequency; The spring sheet, the magnetic voice coil is arranged at the lower wall of the spring sheet; The conductive component is made of non-magnetic material, the lower wall of the conductive component is connected to the spring sheet, the upper wall of the conductive component is in contact with the top wall of the cavity, and is arranged opposite to the sound outlet hole.

2. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 1, characterized in that: The outer shell includes a base with an opening at the upper end and an upper cover detachably mounted on the base, the upper cover and the base enclose the accommodating space, the sound outlet is arranged on the upper cover, and the wall surface of the upper cover away from the base is a vibration surface.

3. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 2, characterized in that: The sound outlet hole is arranged in the middle of the upper cover, and the spring piece, the sound outlet hole, the magnetic circuit component and the magnetic voice coil are coaxially arranged and are all elliptical or circular.

4. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 2, characterized in that: The lower wall of the upper cover is provided with a surrounding portion extending downwardly at the periphery of the sound outlet hole, and the upper end of the conducting component extends into the surrounding portion and is of a size suitable to the surrounding portion.

5. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 4, characterized in that: The conductive component includes a first positioning seat fitted with the spring, a second positioning seat fitted with the lower wall of the upper cover, and a guide column arranged between the first positioning seat and the second positioning seat, and the diameter of the guide column is smaller than the diameter of the first positioning seat and the diameter of the second positioning seat.

6. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 5, characterized in that: The diameter of the second positioning seat is greater than the diameter of the first positioning seat.

7. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 5, characterized in that: The cross section of the conductive component is in the shape of an I.

8. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 5, characterized in that: The guide column and the first positioning seat are integrally arranged.

9. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 5, characterized in that: The guide column is a hollow structure.

10. The vibration assembly for preventing side sound leakage of a bone conduction earphone according to claim 5, characterized in that: The spring sheet includes circular rings spaced apart along the same axis and a support arm connecting two adjacent circular rings. The first positioning seat is connected to the innermost circular ring, and the magnetic voice coil is connected to the circular ring located in the middle.

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