A miniature coaxial horn unit

Abstract

This utility model provides a miniature coaxial speaker unit, comprising: an upper bracket, an upper diaphragm fixedly mounted on the upper end of the upper bracket, a lower bracket fixedly mounted on the bottom of the upper bracket, a lower diaphragm fixedly mounted on the bottom of the lower bracket, and a voice coil II fixedly mounted on the upper end of the lower bracket. This miniature coaxial speaker unit, through the arrangement of the upper bracket, upper diaphragm, lower bracket, lower diaphragm, and voice coil II, with the upper and lower brackets fixedly connected by a cavity, provides stable support for the overall structure and serves as a key path for vibration transmission, allowing the vibration of voice coil II to be smoothly transmitted to the upper bracket, driving the upper diaphragm to vibrate and produce bass. The space inside the lower bracket provides a mounting base for related components. The lower diaphragm, as a tweeter diaphragm, vibrates to produce sound under the drive of the tweeter component. Voice coil II, as the source of bass vibration, has its vibration transmitted through the bracket, ensuring effective bass output. Combined with the coaxial design, this ensures that the vibration centers of high and low frequencies are aligned, resulting in good sound directivity.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and more specifically, to a miniature coaxial loudspeaker unit. Background Technology

[0002] A loudspeaker is a transducer that converts electrical signals into sound signals. It plays a central role in the audio systems of various electronic devices, and its performance directly determines the clarity and layering of sound reproduction, thus affecting the user's listening experience. In portable devices such as laptops, the loudspeaker plays an even more crucial role in outputting audio and transmitting sound information.

[0003] However, existing laptop speakers have the following problems when in use:

[0004] Currently, mainstream laptop speakers are limited by the internal space of the device and mostly adopt a downward sound output installation method. Although this design can save installation space, high-frequency sound waves are easily affected by the internal structure of the body and reflection during transmission, resulting in serious high-frequency loss and weak treble performance. It is difficult to reproduce clear high-frequency ranges, resulting in the common problem of "insufficient treble and muffled sound". Adding an additional tweeter unit next to the woofer will take up more speaker volume, which contradicts the "thin and light" design requirements of laptops.

[0005] This invention can effectively improve high-frequency sound without occupying the speaker's volume. Utility Model Content

[0006] The present invention aims to solve the technical problems mentioned in the background art and provide a miniature coaxial speaker unit.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a miniature coaxial speaker unit, comprising: an upper bracket, an upper diaphragm fixedly mounted on the upper end of the upper bracket, a lower bracket fixedly mounted on the bottom of the upper bracket, a lower diaphragm fixedly mounted on the bottom of the lower bracket, a voice coil II fixedly mounted on the upper end of the lower bracket, the upper diaphragm being a bass diaphragm and the lower diaphragm being a tweeter diaphragm, an accommodating cavity being formed inside the upper bracket, the lower bracket being embedded and fixedly connected within the accommodating cavity, with the bottom of the lower bracket protruding outwards, a connecting cavity being formed inside the lower bracket, the voice coil II being placed inside the lower bracket, the upper end of the lower diaphragm passing through the connecting cavity and embedded in the bottom of the voice coil II, the upper end of the voice coil II being flush with the upper bracket.

[0008] A further preferred embodiment: connecting grooves are provided on both the left and right sides of the upper rear end of the connecting cavity, and the connecting grooves are fixedly connected to the lower diaphragm.

[0009] A further preferred embodiment: connecting flexible plates are fixedly installed on both the left and right sides of the upper rear side of the lower diaphragm, the connecting flexible plates are adapted to the connecting groove, and the connecting flexible plates are embedded in the connecting groove for fixed connection.

[0010] A further preferred embodiment: a tweeter magnet is fixedly installed at the middle of the upper end of the lower diaphragm, a washer is fixedly installed at the bottom of the tweeter magnet, and a voice coil is arranged around the tweeter magnet and the washer.

[0011] A further preferred embodiment: the tweeter magnet, washer one, and voice coil one are all embedded in the bottom of voice coil two through a connecting cavity.

[0012] A further preferred embodiment: a second washer is fixedly installed in the middle of the voice coil two, and a connecting cavity is opened at the bottom of the second washer. The tweeter magnet, the first washer, and the first voice coil are all connected by being embedded inside the connecting cavity.

[0013] A further preferred embodiment: the washer cap at the bottom of the second voice coil is located above the connecting flexible plate.

[0014] Beneficial effects:

[0015] 1. By designing an upper diaphragm as the bass diaphragm and a lower diaphragm as the tweeter diaphragm, separate high and low frequency sound generation is achieved. The upper diaphragm, driven by the bracket, vibrates at low frequencies with a large amplitude, accurately reproducing the low-frequency range. The lower diaphragm, driven by the tweeter component, vibrates at high frequencies with a small amplitude, clearly presenting the high-frequency range. Both diaphragms rely on a coaxial structure with their vibration center axes coinciding, ensuring that the high and low frequency sound waves propagate in the same direction, avoiding sound dispersion and improving directivity and positioning accuracy. The lower diaphragm is fixed to the connecting slot via a connecting flexible plate and, with the washer's double pressure cap, ensures stable vibration without excessive wobbling. The upper diaphragm is rigidly driven by the bracket, resulting in efficient vibration. This design balances high and low frequency performance in a miniaturized structure, while also reducing noise, resulting in clear and layered output sound.

[0016] 2. By incorporating a connecting cavity, the component provides precise assembly space and connection paths, allowing tweeter components such as the tweeter magnet, washer I, and voice coil I to be neatly embedded and connected to the bottom of voice coil II. This achieves compact integration of the tweeter and woofer components, meeting the requirements of miniaturization design. Simultaneously, it provides a channel for the upper end of the lower diaphragm to pass through and connect to voice coil II, ensuring the stability of vibration transmission. The connecting groove on the connecting cavity is compatible with the connecting flexible plate of the lower diaphragm, further securing the lower diaphragm. Combined with the washer II pressure cover, this makes the lower diaphragm vibrate more smoothly, reducing offset and noise. In addition, the connecting cavity constrains the installation and vibration direction of the components, helping to maintain a coaxial structure and ensuring that the propagation direction of high and low frequency sound waves is consistent, thus improving sound quality.

[0017] 3. By setting up connecting grooves and connecting flexible plates, a stable connection point is provided for the lower diaphragm and the lower support. The connecting flexible plate is embedded in the connecting groove for fixation, which can firmly fix the lower diaphragm in the predetermined position and prevent the lower diaphragm from shifting as a whole during high-frequency vibration. At the same time, the connecting flexible plate has flexible characteristics, which can achieve fixation without hindering the high-frequency vibration of the lower diaphragm, ensuring that the high-frequency vibration can be transmitted smoothly. This connection method can also buffer the impact force during vibration. Combined with the pressure of the washer II, it further reduces the excessive shaking of the lower diaphragm, reduces the possibility of noise generation, and makes the high-frequency sound more stable and clear.

[0018] 4. In summary, this miniature coaxial speaker unit, through its structure including an upper bracket, upper diaphragm, lower bracket, lower diaphragm, and voice coil II, achieves efficient and stable sound production. The upper and lower brackets are fixedly connected by a housing cavity, providing stable support for the overall structure and serving as a key path for vibration transmission. This allows the vibration of voice coil II to be smoothly transmitted to the upper bracket, driving the upper diaphragm (bass diaphragm) to vibrate and produce bass. The space inside the lower bracket provides a mounting base for related components. The lower diaphragm, as the tweeter diaphragm, vibrates and produces sound under the drive of the tweeter component. Voice coil II, as the source of bass vibration, has its vibration transmitted through the bracket, ensuring effective bass output. These structures work together, combined with the coaxial design, to ensure that the vibration centers of high and low frequencies are aligned, resulting in good sound directivity and achieving clear and layered sound quality within a miniaturized structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the internal connection structure of the upper support of this utility model.

[0022] Figure 4 This is a schematic diagram of the connection structure between the lower support and the washer of this utility model.

[0023] Figure 5 This is a schematic diagram of the lower diaphragm structure of this utility model.

[0024] Figure 1-5 In the middle: 1. Upper support; 101. Accommodating cavity; 2. Upper diaphragm; 3. Lower support; 301. Connecting cavity; 302. Connecting groove; 4. Lower diaphragm; 401. Connecting flexible board; 402. Tweeter magnet; 403. Washer 1; 404. Voice coil 1; 5. Voice coil 2; 501. Washer 2. Detailed Implementation

[0025] The following will refer to the appendix in the embodiments of this utility model. Figures 1-5The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0026] Please see Figure 1-5In this embodiment of the present invention, a miniature coaxial speaker unit includes: an upper bracket 1, an upper diaphragm 2 fixedly mounted on the upper end of the upper bracket 1, a lower bracket 3 fixedly mounted on the bottom of the upper bracket 1, a lower diaphragm 4 fixedly mounted on the bottom of the lower bracket 3, and a voice coil 5 fixedly mounted on the upper end of the lower bracket 3. The upper diaphragm 2 is a bass diaphragm, and the lower diaphragm 4 is a tweeter diaphragm. An accommodating cavity 101 is formed inside the upper bracket 1, and the lower bracket 3 is embedded in the accommodating cavity 101 and fixedly connected, with the bottom of the lower bracket 3 protruding outward. A connecting cavity 301 is formed inside the lower bracket 3, and the voice coil 5 is placed inside the lower bracket 3. The upper end of the lower diaphragm 4 passes through the connecting cavity 301 and is embedded in the bottom of the voice coil 5. The upper end of the voice coil 5 is flush with the upper bracket 1, and a tweeter magnet is fixedly mounted in the middle of the upper end of the lower diaphragm 4. 402. A washer 403 is fixedly mounted on the bottom of the tweeter magnet 402. A voice coil 404 is arranged around the tweeter magnet 402 and washer 403. When an audio signal (including different frequency bands such as treble and bass) is transmitted to the speaker unit, the signal will drive the corresponding voice coil: the bass signal is transmitted to the second voice coil 5 (fixed on the upper end of the lower bracket). The second voice coil 5 is in a magnetic field environment. According to the "left-hand rule", the current-carrying voice coil 5 will be subjected to electromagnetic force and produce vertical vibration. The second voice coil 5 is fixed on the lower bracket 3, and its vibration will directly drive the lower bracket 3 to vibrate synchronously. The lower bracket 3 is embedded in the receiving cavity 101 of the upper bracket 1 and fixedly connected. Therefore, the vibration of the lower bracket 3 will be transmitted to the upper bracket 1, and finally drive the upper diaphragm 2 at the upper end of the upper bracket 1. Vibration (the upper diaphragm is mainly responsible for low-frequency sound production), high-frequency signals are transmitted to voice coil 404 (surrounding tweeter magnet 402 and washer 403). Tweeter magnet 402 generates its own magnetic field, and the current-carrying voice coil 404 experiences electromagnetic force in the magnetic field, generating high-frequency vibration. The vibration of voice coil 404 directly acts on the tweeter magnet 402 that it surrounds (the tweeter magnet 402 is fixed to the upper middle part of the lower diaphragm 4), thereby driving the lower diaphragm 4 to vibrate (the lower diaphragm 4 is mainly responsible for high-frequency sound production). The washer 403 (a thin metal sheet) serves as a magnetic conductor, enhancing the magnetic field strength around tweeter magnet 402, improving the force efficiency of voice coil 404, and making high-frequency vibration more sensitive. The upper diaphragm 2 (bass) is driven by the lower support 3 and the upper support 1. The lower diaphragm (tweeter) vibrates at low frequency and large amplitude, pushing the surrounding air to generate low-frequency sound waves, thus forming bass. The lower diaphragm (tweeter) is driven by the voice coil 404 and the tweeter magnet 402 to vibrate at high frequency and small amplitude, pushing the surrounding air to generate high-frequency sound waves, thus forming treble. Since the lower bracket 3 is embedded in the accommodating cavity 101 of the upper bracket 1, and the upper end of the voice coil 5 is flush with the upper bracket 1, the vibration center of the entire structure (the vibration axis of the voice coil 5 and the voice coil 404) coincides ("coaxial" characteristic). Therefore, the propagation direction of the high and low frequency sound waves is consistent, avoiding the sound dispersion problem caused by the difference in the high and low frequency directivity of ordinary non-coaxial speakers. The bottom of the lower bracket 3 is exposed outward, and the lower diaphragm 4 is installed at the bottom to ensure that the high frequency vibration of the lower diaphragm 4 is not excessively interfered with by the upper bracket 1 (bass vibration component).The upper end of the lower diaphragm 4 passes through the connecting cavity 301 of the lower support 3 and connects to the bottom of the second voice coil 5. Simultaneously, the tweeter magnet 402, washer 403, and voice coil 404 are integrated within the connecting cavity 301, saving space and ensuring the vibration direction is vertical through structural constraints (reducing lateral offset and avoiding noise).

[0027] In this embodiment of the invention, connecting grooves 302 are provided on both the left and right sides of the upper rear end of the connecting cavity 301. The connecting grooves 302 are fixedly connected to the lower diaphragm 4. Connecting flexible plates 401 are fixedly installed on both the left and right sides of the upper rear end of the lower diaphragm 4. The connecting flexible plates 401 are adapted to the connecting grooves 302 and are fixedly connected by embedding them into the connecting grooves 302. The washer 2 501 at the bottom of the voice coil 2 5 presses over the connecting flexible plates 401. The connecting flexible plates 401 on the left and right sides of the upper rear end of the lower diaphragm 4 are adapted to the connecting grooves 302 on the connecting cavity 301, providing additional space for the lower diaphragm 4. The fixed point further improves the stability of the lower diaphragm 4 during high-frequency vibration and prevents unnecessary displacement. The washer 2 501 at the bottom of the voice coil 2 5 presses on the top of the connecting flexible plate 401. On the one hand, the weight and pressure of the washer 2 501 can make the connection between the connecting flexible plate 401 and the connecting groove 302 more secure, preventing the connecting flexible plate 401 from falling out of the connecting groove 302 during vibration. On the other hand, the washer 2 501 can play a certain role in restraining and buffering the vibration of the connecting flexible plate 401, making the vibration of the lower diaphragm 4 more regular and reducing the noise generated during vibration.

[0028] In this embodiment of the invention, the tweeter magnet 402, washer 403, and voice coil 404 are all embedded in the bottom of the second voice coil 5 through the connecting cavity 301. A second washer 501 is fixedly installed in the center of the second voice coil 5. A connecting cavity is formed at the bottom of the second washer 501. The tweeter magnet 402, washer 403, and voice coil 404 are all connected by being embedded in the connecting cavity 301. A high-frequency signal is transmitted to the first voice coil 404 (surrounding the tweeter magnet 402 and washer 403). The tweeter magnet 402 generates a magnetic field, and the current-carrying voice coil 404 experiences electromagnetic force in the magnetic field, generating high-frequency vibration. The tweeter magnet 402, washer 403, and voice coil 404 are all embedded in the bottom of the second voice coil 5 through the connecting cavity 301. The washer 501, which is fixedly installed in the middle of the voice coil 2 5, has a connecting cavity at its bottom. The tweeter magnet 402, washer 403, and voice coil 404 are all connected by being embedded in the connecting cavity through the connecting cavity 301. This tight embedding connection allows the vibration of voice coil 404 to be transmitted more accurately. The vibration of voice coil 404 directly acts on the tweeter magnet 402 (which is fixed in the middle of the upper end of the lower diaphragm 4) that it surrounds, thereby driving the lower diaphragm 4, which is mainly responsible for the high-frequency sound production, to vibrate. The washer 403 (a thin metal sheet) is a magnetic conductor that can enhance the magnetic field strength around the tweeter magnet, improve the force efficiency of voice coil 404, and make the high-frequency vibration more sensitive.

[0029] Working principle: The upper bracket 1 has an upper diaphragm 2 (bass diaphragm) fixed at its upper end, and its bottom is fixedly connected to the lower bracket 3 through a receiving cavity 101. The bottom of the lower bracket 3 is exposed and a lower diaphragm 4 (tweeter diaphragm) is installed there. The connecting cavity 301 inside the lower bracket 3 is the core transmission channel. Voice coil 2 5 is fixed to the upper end of the lower bracket 3, and its bottom washer 2 501 presses against the connecting flexible plate 401 of the lower diaphragm 4. The connecting flexible plate 401 is embedded in the connecting groove 302 of the connecting cavity 301 for fixation. The tweeter magnet 402, washer 1 403, and peripheral voice coil 1 404 at the upper end of the lower diaphragm 4 are embedded in the connecting cavity 301 through the connecting cavity 501 of the bottom washer 2 5 of the voice coil 2 5, forming a "bass component with a tweeter magnet embedded in the lower diaphragm 4". The coaxial structure of the "sound component" allows for signal separation according to frequency bands when audio electrical signals containing high and low frequencies are input, driving the corresponding voice coils and triggering electromagnetic vibration. The low-frequency signal is directionally input to voice coil 5 (fixed to the upper end of the lower bracket 3). At this time, voice coil 5 is in an external magnetic field environment. According to the "left-hand rule" of electromagnetism, voice coil 5, carrying alternating current, will experience periodic up-and-down electromagnetic forces, thus generating vibrations matching the frequency of the low-frequency signal. Because voice coil 5 is fixedly connected to the lower bracket 3, its vibration directly drives the lower bracket 3 to vibrate synchronously. The lower bracket 3 is rigidly connected to the upper bracket 1 through the accommodating cavity 101, and the vibration is further transmitted to the upper bracket 1, ultimately driving the upper end of the upper bracket 1... Diaphragm 2 (bass diaphragm) begins to vibrate, and the treble signal is synchronously transmitted to voice coil 404 (surrounding tweeter magnet 402 and washer 403). Tweeter magnet 402 generates a constant magnetic field, while washer 403 enhances the magnetic field strength through its magnetic permeability. Voice coil 404, carrying a high-frequency alternating current, experiences a high-frequency electromagnetic force in the magnetic field, generating a high-frequency vibration corresponding to the treble signal. Voice coil 404, tweeter magnet 402, and washer 403 form a surrounding engagement, and its vibration directly acts on tweeter magnet 402. Tweeter magnet 402 is fixed to the upper center of lower diaphragm 4, so the vibration is transmitted to lower diaphragm 4 (tweeter diaphragm), causing it to vibrate synchronously. The diaphragm, through vibration, pushes the air... Air forms sound waves, and the structural design ensures efficient transmission and directional stability of vibration: the upper diaphragm 2 (bass diaphragm) vibrates at low frequency and large amplitude under the drive of the bracket: the vibration frequency is consistent with the bass signal (usually 20Hz-2kHz), and the amplitude changes with the signal intensity; during the vibration, the upper diaphragm 2 pushes the surrounding air to generate low-frequency sound waves with alternating density, ultimately forming a perceptible bass; the lower diaphragm 4 (tweeter diaphragm) vibrates at high frequency and small amplitude under the drive of the tweeter magnet 402: the vibration frequency matches the tweeter signal (usually 2kHz-20kHz), and with the flexibility of the connecting flexible plate 401, it achieves directional high-frequency vibration under the constraint of the connecting groove 302, avoiding lateral displacement;High-frequency vibrations drive the surrounding air to generate high-frequency sound waves, which propagate along the same axis as the bass sound waves, forming a treble. The tweeter component (tweeter magnet 402, etc.) is embedded in the connecting cavity of the bass component (voice coil 2 5), and the upper end of voice coil 2 5 is flush with the upper bracket 1, so that the vibration axes of voice coil 1 404 and voice coil 2 5 are completely coincident. This design allows the treble and bass sound waves to propagate from the same central axis, avoiding the sound wave dispersion problem of non-coaxial structures, and improving sound directivity and positioning accuracy. The adapter connection between the flexible board 401 and the connecting slot 302 provides fixation for the lower diaphragm 4. The fulcrum, while its flexibility does not hinder high-frequency vibration; the washer 2 501 pressure cap connects to the flexible board 401, which not only strengthens the connection stability to prevent detachment, but also suppresses excess vibration through buffering; the nested structure of the connecting cavity 301 and the accommodating cavity 101 constrains the vibration direction of the bracket to the vertical direction, reducing noise caused by lateral shaking; the coaxial structure achieves simultaneous high and low frequency sound generation; combined with the stabilizing effect of the connecting flexible board, washer, and other components, it achieves high and low frequency separation transmission and coordinated sound generation in a miniaturized size, ultimately outputting a sound with unified directivity and clear sound quality.

Claims

1. A miniature coaxial speaker unit, comprising: An upper bracket (1) is provided with an upper diaphragm (2) fixedly installed at its upper end. A lower bracket (3) is fixedly installed at the bottom of the upper bracket (1). A lower diaphragm (4) is fixedly installed at the bottom of the lower bracket (3). A voice coil (5) is fixedly installed at the upper end of the lower bracket (3). The upper diaphragm (2) is a bass diaphragm, and the lower diaphragm (4) is a treble diaphragm. An accommodating cavity (101) is provided inside the upper bracket (1). The lower bracket (3) is embedded in the accommodating cavity (101) and fixedly connected. The bottom of the lower bracket (3) is exposed outward. A connecting cavity (301) is provided inside the lower bracket (3). The voice coil (5) is placed inside the lower bracket (3). The upper end of the lower diaphragm (4) passes through the connecting cavity (301) and is embedded in the bottom of the voice coil (5) for connection. The upper end of the voice coil (5) is flush with the upper bracket (1).

2. The miniature coaxial speaker unit according to claim 1, characterized in that: The connecting cavity (301) has connecting grooves (302) on both the left and right sides at the rear of the upper end, and the connecting grooves (302) are fixedly connected to the lower diaphragm (4).

3. A miniature coaxial speaker unit according to claim 2, characterized in that: Connecting flexible plates (401) are fixedly installed on both the left and right sides of the upper rear side of the lower diaphragm (4). The connecting flexible plates (401) are adapted to the connecting groove (302), and the connecting flexible plates (401) are embedded in the connecting groove (302) for fixed connection.

4. A miniature coaxial speaker unit according to claim 3, characterized in that: A tweeter magnet (402) is fixedly installed at the middle of the upper end of the lower diaphragm (4), a washer (403) is fixedly installed at the bottom of the tweeter magnet (402), and a voice coil (404) is arranged around the tweeter magnet (402) and washer (403).

5. A miniature coaxial speaker unit according to claim 4, characterized in that: The high-frequency magnet (402), washer 1 (403) and voice coil 1 (404) are all embedded in the bottom of voice coil 2 (5) through the connecting cavity (301).

6. A miniature coaxial speaker unit according to claim 5, characterized in that: A washer 2 (501) is fixedly installed in the middle of the voice coil 2 (5). A connecting cavity is opened at the bottom of the washer 2 (501). The tweeter magnet (402), washer 1 (403) and voice coil 1 (404) are all connected by being embedded in the connecting cavity through the connecting cavity (301).

7. A miniature coaxial speaker unit according to claim 6, characterized in that: The washer 2 (501) at the bottom of the voice coil 2 (5) presses over the connecting flexible plate (401).

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