Ultralow frequency conduction acoustic system based on reverse installation and sapphire reflection structure

Abstract

The invention discloses an ultra-low frequency conduction acoustic system based on reverse installation and a sapphire reflection structure, and belongs to the field of audio acoustics, the ultra-low frequency conduction acoustic system comprises a moving coil unit, the sapphire reflection structure and a sound tube, the moving coil unit is reversely installed on the inner side of an earphone surface cover, and a vibrating diaphragm faces the direction away from a sound outlet; sound waves are reflected to the reflecting surface of the stone surface cover of the sapphire reflecting structure through the rear cavity and then are transmitted to the sound outlet through the sound tube; the surface cover of the sapphire reflection structure is of a customized special-shaped structure, is accurately matched with the reflection angle of the rear cavity, and has optical-grade surface smoothness; the moving coil unit is combined with a plurality of moving iron units and static units, and the moving iron units and the static units adopt a forward sound wave conduction mode; the reverse sound wave path is prolonged and reflected by the high-hardness sapphire, and the low-frequency quantity sense is sufficient and distinct in hierarchy; an independent low-frequency sound path can be realized without increasing the volume of the earphone; low frequency and medium-high frequency are physically isolated, and mutual interference is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of audio acoustics, in particular to an ultra-low frequency conduction acoustic system based on reverse installation and sapphire reflection structure. BACKGROUND

[0002] The existing high-end in-ear earphones usually adopt a multi-unit hybrid structure combined with moving iron units, moving coil units or electrostatic units. The moving coil unit is usually installed in the sound outlet or sound tube path in a forward direction, and the low frequency is directly transmitted to the ear canal.

[0003] However, the existing structure has the following disadvantages: The position of the moving coil unit and the layout of the cavity are limited, and it is difficult to independently optimize the low frequency and medium-high frequency units in a limited space.

[0004] The traditional forward sound moving coil has a long low frequency wavelength in a limited cavity, which is easy to cause acoustic interference with medium-high frequency, affecting the sound field positioning and level.

[0005] Ordinary reflective materials (resin, metal) will cause frequency response attenuation and phase shift during sound wave reflection, resulting in loss of low frequency details.

[0006] The internal space of the multi-unit earphone is compact, and when additional low frequency path design is added, it is easy to cause volume expansion or excessive weight problems.

[0007] Therefore, an ultra-low frequency conduction acoustic system capable of realizing low frequency optimization, accurate phase, and mutual interference with medium-high frequency in a limited cavity is needed. SUMMARY

[0008] In view of the deficiencies of the prior art, the present application provides an ultra-low frequency conduction acoustic system based on reverse installation and sapphire reflection structure, which solves the problems raised in the background art.

[0009] Technical solution: To solve the above technical problems, according to one aspect of the present application, more specifically, an ultra-low frequency conduction acoustic system based on reverse installation and sapphire reflection structure, comprising the following core structure: Unit configuration At least one moving coil unit is reversely installed on the inner side of the earphone cavity cover, and the diaphragm faces away from the sound outlet.

[0010] A plurality of moving iron units (such as 12) and electrostatic units (such as 2) are installed in the acoustic path in a conventional forward conduction manner.

[0011] Reverse sound wave conduction path The sound wave generated by the reversely installed moving coil unit is first transmitted to the rear cavity of the earphone.

[0012] The acoustic wave is reflected inside the back cavity and is guided to the sapphire reflecting surface at the position of the face cover.

[0013] The sapphire face cover is precisely processed to form an optical-grade reflecting interface, which changes the direction of the acoustic wave and focuses the acoustic wave to the entrance of the acoustic tube.

[0014] The acoustic wave is transmitted to the earphone sound outlet through the independent acoustic tube and enters the ear canal.

[0015] Sapphire reflecting structure The face cover is made of sapphire material with a Mohs hardness of 9, which has high reflection efficiency and low acoustic dyeing characteristics.

[0016] The face cover can be a customized special-shaped structure, which is sealed with the earphone cavity and accurately matches the angle of the reflected acoustic path.

[0017] The sapphire reflecting surface also serves as an appearance display function and can see through the internal mechanical structure.

[0018] Further, the acoustic advantage The reverse installation of the moving coil unit and the middle and high frequency unit is physically isolated to avoid acoustic interference.

[0019] The sapphire reflecting surface improves the reflection accuracy and energy retention of low frequency.

[0020] Independent acoustic tube transmission can reduce low frequency loss and improve phase consistency, realizing deep and clean low frequency response.

[0021] The beneficial effects of the present application of an ultralow frequency transmission acoustic system based on reverse installation and sapphire reflecting structure are: Low frequency optimization: The reverse acoustic path is lengthened and reflected by high-hardness sapphire, and the low frequency quantity is sufficient and clear.

[0022] Compact structure: Independent low frequency acoustic path can be realized without increasing the size of the earphone.

[0023] Acoustic isolation: Low frequency and middle and high frequency are physically isolated to reduce mutual interference.

[0024] Durable and beautiful: The sapphire reflecting surface is wear-resistant and scratch-resistant, and has high-end visual effect. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in combination with the drawings and specific implementation methods.

[0026] Fig. 1 The system framework of the present application is shown in the figure; Fig. 2 The structure of the present application is shown in the figure. DETAILED DESCRIPTION

[0027] Hereinafter, the present application will be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In order to make the technical scheme of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Embodiment one Reference Figs. 1-2 An ultra-low frequency conductive acoustic system based on reverse installation and sapphire reflection structure, an in-ear ultra-low frequency earphone, comprising: Moving coil unit: micro moving coil unit is reversely installed through a plastic support, the diaphragm is directed away from the sound outlet, and is sealed and fixed by ultrasonic welding Auxiliary unit: a plurality of moving iron units and electrostatic units are forwardly installed, and are respectively responsible for mid-high frequency and ultrahigh frequency signals Sapphire structure: a sapphire cover of a customized size is internally polished and coated to improve reflection efficiency, and the edge is designed as a bevel structure matched with the cavity Independent sound tube: one end of the metal sound tube is fixed at the sound wave focusing position of the sapphire reflection surface, and the other end is connected to the sound outlet, and the outside is sealed and isolated by a silica gel sleeve Preferably, the sound wave path The ultra-low frequency sound wave generated by the moving coil unit is first propagated to the rear cavity, reflected to the sapphire reflection surface through the rear cavity reflection wall, and then transmitted to the sound outlet through the sound tube, which maintains low loss throughout and has no obvious crosstalk with the mid-high frequency signal. Performance characteristics of the embodiment: clear ultra-low frequency response, mid-high frequency signal transmission is not disturbed; the structure is stable, there is no looseness after multiple plug-in tests, and the sapphire cover has good wear resistance Embodiment two Reference Figs. 1-2 An ultra-low frequency conductive acoustic system based on reverse installation and sapphire reflection structure, an in-ear ultra-low frequency earphone, comprising: Moving coil unit: large-size moving coil unit is reversely installed, the rear cavity volume is larger and the sound absorbing material is built-in to reduce standing wave Sapphire structure: the sapphire cover of increased size adopts a double-curved surface design to improve the reflection range and is fixed by screw connection Sound tube design: the metal sound tube is built-in with damping material to adjust the transmission characteristics, and a tuning structure is additionally added to adapt to different use preferences Performance characteristics of the embodiment: integrated active noise reduction function, which can effectively attenuate environmental noise, and supports wireless high-definition audio transmission.

[0030] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An ultra-low frequency conducted acoustic system based on reverse installation and sapphire reflection structure, comprising a moving coil unit, a sapphire reflection structure, a sound tube, characterized in that: The moving coil unit is reversely installed inside the earphone face cover, the diaphragm faces away from the sound outlet, sound waves are reflected to the face cover reflecting surface of the sapphire reflecting structure through the back cavity, and then transmitted to the sound outlet through the sound tube.

2. The ultra-low frequency acoustic system based on reverse mounting and sapphire reflection structure according to claim 1, characterized in that: The face cover of the sapphire reflecting structure is a customized special-shaped structure, accurately matches the back cavity reflection angle, and has an optical-grade surface finish.

3. The ultra-low frequency acoustic system based on reverse mounting and sapphire reflection structure according to claim 2, characterized in that: The moving coil unit is combined with a plurality of moving iron units and electrostatic units, the moving iron units and the electrostatic units adopt a positive sound wave conduction mode.

4. The ultra-low frequency acoustic system based on reverse mounting and sapphire reflection structure according to claim 3, characterized in that: The sound tube is an independent sealed structure, ensuring that low-frequency sound waves and medium-high frequency sound waves do not interfere with each other during transmission.

5. The ultra-low frequency acoustic system based on reverse mounting and sapphire reflection structure according to claim 4, characterized in that: The face cover of the sapphire reflecting structure has the functions of acoustic reflection and visual display, and can be used to decorate the internal mechanical structure.

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