Bone conduction horn structure with balanced magnetic circuit

Abstract

The utility model discloses a bone conduction horn structure with a balanced magnetic circuit. The bone conduction horn structure comprises a bracket, a vibrating reed, a voice coil, a PCB (Printed Circuit Board), U iron, a washer and a magnet, the support is provided with a cavity, the PCB, the voice coil, the washer, the magnet and the U-shaped iron are sequentially arranged in the cavity from top to bottom, the vibrating reed is a metal vibrating reed and is arranged in the middle of the cavity, a through hole is formed in the center of the vibrating reed, the lower end of the U-shaped iron penetrates through the through hole, and a connecting face used for making contact with the vibrating reed is arranged on the outer side of the U-shaped iron. The lower end of the connecting surface is contacted and positioned with the upper end of the vibrating reed; thus, through the design of each component, the vibration sheet is arranged at the middle section position of the cavity and is in contact positioning with the U iron, the influence on the bone conduction loudspeaker in the falling or using vibration process of the product is reduced, and the distortion problem of audio signals is effectively reduced, so that the balance of an internal magnetic field of the bone conduction loudspeaker and the use stability of the product are ensured; the usability is good, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field technology of loudspeaker, especially a bone conduction loudspeaker structure with balanced magnetic circuit. BACKGROUND

[0002] At present, bone conduction is a sound conduction mode, that is, converting sound into mechanical vibration of different frequencies, transmitting sound waves through human skull, bone labyrinth, inner ear lymph, spiral organ and auditory center; compared with the classic sound conduction mode of generating sound waves through diaphragm, bone conduction saves many steps of sound wave transmission, can realize clear sound restoration in noisy environment and sound waves will not affect others because of diffusion in air.

[0003] With the miniaturization of earphones, bone conduction earphone loudspeakers also tend to be miniaturized, and the bone conduction earphone generally includes an earphone shell, a bone conduction loudspeaker and an audio output circuit arranged in the earphone shell, the audio output circuit outputs an electric signal to the bone conduction loudspeaker, so that the bone conduction loudspeaker vibrates according to the received electric signal and drives the earphone shell to vibrate, the earphone shell can drive the bone to vibrate, and the sound wave is transmitted to the inner ear through the vibration of the bone; however, the existing bone conduction loudspeaker structure design is poor, because the bone conduction loudspeaker is in a vibrating state during use, the magnetic circuit part of the bone conduction loudspeaker is not balanced in the vibration, which causes the magnetic circuit to be out of axis with the voice coil during up and down operation, resulting in distortion of the audio signal, increasing the low-frequency vibration energy loss, and thus reducing the user's experience effect, and the application range is small.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility model content

[0005] Therefore, the utility model provides a bone conduction loudspeaker structure with balanced magnetic circuit, which uses the vibrating reed to be arranged at the middle segment position of the chamber and in contact with the U-shaped iron for positioning, reduces the impact of the product on the bone conduction loudspeaker during falling or vibration, effectively reduces the distortion of the audio signal, ensures the balance of the magnetic field inside the bone conduction loudspeaker and the stability of the product in use, has good usability and wide application range.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The application discloses a bone conduction loudspeaker structure with balanced magnetic circuit, which comprises a support, a vibrating plate, a voice coil, a PCB board, a U-shaped iron, a Hua Si and a magnet.

[0008] As a preferred solution, the support is made of plastic material, and the support is connected with the vibrating plate through injection molding.

[0009] As a preferred solution, the U-shaped iron is provided with a first extension part extending towards the inner wall of the cavity, the first extension part is provided with a second extension part extending towards the vibrating plate, and the connecting surface is arranged at the lower end of the second extension part.

[0010] As a preferred solution, the vibrating plate is made of titanium metal material.

[0011] As a preferred solution, the vibrating plate comprises an inner ring part, an outer ring part, a first connecting part, a second connecting part and an elastic connecting edge, the through hole is arranged on the inner ring part, the outer ring part is located at the periphery of the inner ring part, the first connecting part is arranged on the outer side of the inner ring part, the first connecting part extends from the outer side of the inner ring part towards the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part extends from the inner side of the outer ring part towards the inner ring part, the elastic connecting edge is in an arc structure, and the two ends of the elastic connecting edge are connected to the first connecting part and the second connecting part respectively.

[0012] As a preferred solution, the first connecting part, the second connecting part and the elastic connecting edge are all provided with four.

[0013] As a preferred solution, the outer side of the outer ring part is provided with a plurality of reinforcing parts arranged at intervals around the periphery of the outer ring part.

[0014] As a preferred solution, the lower end of the cavity is provided with a protective cover, the protective cover is located below the U-shaped iron, and the protective cover is a stainless steel protective cover.

[0015] As a preferred solution, the lower end of the cavity is provided with a mounting step, and the upper end of the protective cover is positioned at the lower end of the mounting step.

[0016] The utility model discloses have obvious advantages and beneficial effects compared with prior art, specifically speaking, from the above technical scheme can know, it mainly is through the design of each component, utilize the vibration piece to set in the middle section position of chamber and with U iron contact positioning, reduce the influence that product causes to bone conduction loudspeaker in falling or using vibration process, and effectively reduce the distortion problem of audio signal, thereby guarantee the balance of bone conduction loudspeaker internal magnetic field and the use stability of product, structure design is ingenious and reasonable, and the usability is good, and the scope of application is wide.

[0017] Secondly, the first extension and the second extension are arranged, so that the U iron and the vibration piece are assembled and connected, the connection strength between the U iron and the vibration piece and the use stability of the product are improved, meanwhile, the vibration piece is made of titanium metal material, has better corrosion resistance, strength, deformation resistance and toughness, and further reduces the influence of the product on the components in the chamber during falling or collision, thereby improving the service life of the product and the usability.

[0018] In addition, the reinforcing portion is arranged, which is beneficial to improving the connection strength between the vibration piece and the support, thereby improving the use stability of the vibration piece on the support, and the practicality is high.

[0019] In order to more clearly illustrate the structural features and effects of the utility model, the utility model will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is the sectional view of the embodiment of the utility model;

[0021] Fig. 2 is the structure schematic view of the vibration piece of the embodiment of the utility model.

[0022] The figure mark is explained as follows:

[0023] 11, support 111, chamber

[0024] 112, mounting step 12, vibration piece

[0025] 121, through hole 122, inner ring portion

[0026] 123, outer ring portion 124, first connecting portion

[0027] 125, second connecting portion 126, elastic connecting edge

[0028] 127, reinforcing portion 13, voice coil

[0029] 14, PCB board 15, U iron

[0030] 151, connecting surface 152, first extension

[0031] 153, second extension 16, washer

[0032] 17. Magnet 18. Protective cover. DETAILED DESCRIPTION

[0033] Please refer to Figs. 1-2 As shown, it shows the specific structure of an embodiment of the present utility model.

[0034] A magnetically balanced bone conduction speaker structure includes a bracket 11, a vibrating plate 12, a voice coil 13, a PCB board 14, a U iron 15, a washer 16, and a magnet 17; wherein:

[0035] The bracket 11 has a chamber 111, and the PCB board 14, voice coil 13, washer 16, magnet 17 and U iron 15 are arranged in the chamber 111 from top to bottom. The vibration plate 12 is a metal vibration plate, and the vibration plate 12 is arranged in the middle of the chamber 111. The center of the vibration plate 12 is provided with a through hole 121. The bracket 11 is made of plastic material and is connected to the vibration plate 12 by injection molding. The lower end of the U iron 15 passes through the through hole 121, and the outer side of the U iron 15 is provided with The connecting surface 151 is used to contact the vibration plate, and the lower end of the connecting surface 151 is in contact with the upper end of the vibration plate 12 for positioning; in this way, through the design of various components, the vibration plate is arranged in the middle position of the cavity and is in contact with the U iron for positioning, which is beneficial to improve the structural strength of the U iron on the bracket, reduce the impact of the product on the bone conduction speaker during falling or vibration during use, and effectively reduce the distortion problem of the audio signal, thereby ensuring the balance of the magnetic field inside the bone conduction speaker and the stability of the product, with good usability and a wide range of applications.

[0036] Specifically, the vibrating reed 12 comprises an inner ring portion 122, an outer ring portion 123, a first connecting portion 124, a second connecting portion 125 and an elastic connecting edge 126, the through hole 121 is arranged on the inner ring portion 122, the outer ring portion 123 is located at the periphery of the inner ring portion 122, the first connecting portion 124 is arranged on the outer side of the inner ring portion 122, the first connecting portion 124 is arranged extending from the outer side of the inner ring portion to the outer ring portion, the second connecting portion 125 is arranged on the inner side of the outer ring portion 123, the second connecting portion 125 is arranged extending from the inner side of the outer ring portion to the inner ring portion, the elastic connecting edge 126 is in an arc structure, the two ends of the elastic connecting edge 126 are connected to the first connecting portion 124 and the second connecting portion 125 respectively, preferably, the first connecting portion 124, the second connecting portion 125 and the elastic connecting edge 126 are all arranged with four, the vibrating reed 12 is made of titanium metal material, thus, the vibrating reed is made of titanium metal material, which has better corrosion resistance, strength, deformation resistance, toughness and other effects, further reduces the influence of the product on the components in the cavity during falling or collision, thereby improving the service life and usability of the product.

[0037] Preferably, the outer side of the outer ring portion 123 is provided with a plurality of reinforcing portions 127 arranged at intervals around the circumference of the outer ring portion, thus, the arrangement of the reinforcing portions is conducive to improving the connection strength between the vibrating reed and the support, thereby improving the use stability of the vibrating reed on the support, and the practicability is strong.

[0038] In addition, the outer side of the U-shaped iron 15 is provided with a first extension portion 152 extending towards the inner wall of the cavity, the first extension portion 152 is provided with a second extension portion 153 extending towards the vibrating reed, and the connecting surface 151 is arranged at the lower end of the second extension portion 153, thus, the arrangement of the first extension portion and the second extension portion facilitates the assembly and connection between the U-shaped iron and the vibrating reed, improves the connection strength between the U-shaped iron and the vibrating reed and the use stability of the product.

[0039] In addition, the lower end of the cavity 111 is provided with a protective cover 18, the protective cover 18 is located below the U-shaped iron 15, the protective cover 18 is a stainless steel protective cover, the lower end of the cavity 111 is provided with a mounting step 112, and the upper end of the protective cover 18 is located at the lower end of the mounting step 112.

[0040] The design focus of the utility model lies in that it mainly designs various components, utilizes the vibrating reed arranged at the middle segment position of the cavity and in contact with the U-shaped iron for positioning, reduces the influence of the product on the bone conduction speaker during falling or vibrating, effectively reduces the distortion problem of the audio signal, thereby guarantees the balance of the magnetic field inside the bone conduction speaker and the use stability of the product, the structure design is ingenious and reasonable, the usability is good, and the application range is wide.

[0041] Secondly, the first extension and the second extension are arranged to facilitate the assembly connection between the U-shaped iron and the vibrating plate, improve the connection strength between the U-shaped iron and the vibrating plate and the use stability of the product, meanwhile, the vibrating plate is made of titanium metal material, which has better corrosion resistance, strength, deformation resistance, toughness and other effects, further reduces the impact of the product on the components in the chamber during falling or collision, thereby improving the service life of the product and the usability is good;

[0042] In addition, the reinforcing part is arranged, which is conducive to improving the connection strength between the vibrating plate and the support, thereby improving the use stability of the vibrating plate on the support, and the practicality is strong.

[0043] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application in any way, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

Claims

1. A magnetic circuit balanced bone conduction speaker structure, characterized in that: It includes support, vibrating plate, voice coil, PCB board, U iron, magnet and magnet; wherein: the support has a chamber, the PCB board, voice coil, magnet, magnet and U iron are sequentially arranged from top to bottom in the chamber, the vibrating plate is a metal vibrating plate, the vibrating plate is arranged at the middle section of the chamber, the center of the vibrating plate is provided with a through hole, the lower end of the U iron passes through the through hole, the outer side of the U iron is provided with a connecting surface for contacting the vibrating plate, and the lower end of the connecting surface is in contact with the upper end of the vibrating plate.

2. The magnetic circuit balanced bone conduction speaker structure according to claim 1, characterized in that: The support is made of plastic material, and the support is connected with the vibrating plate by injection molding.

3. The magnetic circuit balanced bone conduction speaker structure according to claim 1, characterized in that: The outer side of the U iron is provided with a first extension part extending towards the inner wall of the chamber, the first extension part is provided with a second extension part extending towards the vibrating plate, and the connecting surface is arranged at the lower end of the second extension part.

4. The magnetic circuit balanced bone conduction speaker structure according to claim 1, characterized in that: The vibrating plate is made of titanium metal material.

5. The magnetic circuit balanced bone conduction speaker structure according to claim 1, wherein: The vibrating plate includes inner ring part, outer ring part, first connecting part, second connecting part and elastic connecting edge, the through hole is arranged on the inner ring part, the outer ring part is located at the periphery of the inner ring part, the first connecting part is arranged on the outer side of the inner ring part, the first connecting part is arranged on the outer side of the inner ring part, the first connecting part is arranged on the outer side of the inner ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second connecting part is arranged on the inner side of the outer ring part, the second 6. The magnetically balanced bone conduction speaker structure of claim 5, wherein: ​ 7. The magnetic circuit balanced bone conduction speaker structure according to claim 5, characterized in that: ​ 8. The magnetically balanced bone conduction speaker structure of claim 1, wherein: ​ 9. The magnetically balanced bone conduction speaker structure of claim 8, wherein: ​

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