Low-frequency horn structure

Abstract

The utility model provides a low-frequency horn structure, which comprises a basin frame, a U-shaped iron is arranged on the basin frame, a magnet piece is arranged on the U-shaped iron, a washer is arranged on the magnet piece, an accommodating cavity is arranged between the U-shaped iron and the side surface of the washer, an accommodating groove is arranged above the washer, a damper is arranged in the accommodating groove, a voice coil is arranged in the accommodating cavity, and a loudspeaker is arranged in the voice coil. The upper end of the voice coil is connected with the bottom of the dustproof cap, the middle of the dustproof cap is connected with the limiting column, and the sounding effect is good.

Description

Technical Field

[0001] This utility model relates to the field of audio technology, specifically to a low-frequency speaker structure. Background Technology

[0002] With the continuous development of society and economy, audio equipment is being used more and more frequently, and the requirements for sound quality are also increasing. In loudspeaker audio output devices, the size of the spider and voice coil is crucial to the performance of bass. When current passes through the voice coil, the magnetic field it generates interacts with the fixed magnetic field formed by the permanent magnet inside the loudspeaker, causing the voice coil to move along the axis on the spider, thereby driving the diaphragm to vibrate and thus producing sound.

[0003] For example, Chinese Patent Application No. 202322813784.7, published on September 17, 2024, discloses a novel low-frequency enhanced piezoelectric speaker structure, including a moving coil and a piezoelectric vibrator. The piezoelectric vibrator is installed inside the moving coil. The moving coil includes a bracket, a magnetic frame, a magnet, pole pieces, a spider, a voice coil, and a diaphragm. The magnetic frame is installed at the bottom of the bracket, containing the magnet and pole pieces. The spider is installed in the middle of the bracket, and the voice coil is installed on the spider. The lower part of the voice coil extends into the magnetic frame, with the magnet and pole pieces located inside the voice coil. The diaphragm is installed at the top of the bracket, and the piezoelectric vibrator is installed at the top of the voice coil. The voice coil and the piezoelectric vibrator are coaxially arranged, forming a bifurcated coil structure. Through this method, the moving coil structure provides a large amplitude at low frequencies, while the piezoelectric vibration provides amplitude at mid-to-high frequencies. By combining the advantages of both, the low-frequency performance of the piezoelectric speaker can be enhanced, achieving a low-frequency effect close to that of a traditional moving coil speaker.

[0004] The existing method involves connecting the spider and voice coil to the outside of the magnet. However, because of the need for the spider, the thickness of the voice coil cannot be too large, as this would affect the size of the spider. The size of the spider and voice coil directly affects the low-frequency response performance of the speaker. A spider and a large voice coil can provide better low-frequency performance because the voice coil can vibrate more significantly within a stronger magnetic field, thereby enhancing the speaker's sensitivity and improving sound quality. Therefore, by optimizing the relationship between the spider and the voice coil, the low-frequency response performance of the entire speaker system can be effectively improved, resulting in a more impactful bass experience.

[0005] For example, patent document with patent application number 202320766862.X and publication date of December 12, 2023 discloses a small-volume loudspeaker with a large voice coil, including a housing, a U-shaped iron at the center of the bottom of the housing, a gasket at the bottom of the inner side of the U-shaped iron, a magnet at the top of the gasket, a washer at the top of the magnet, and a circular rectangular voice coil at the top of the washer. This small-volume loudspeaker with a large voice coil internally equips the speaker with a circular rectangular voice coil. Compared to existing circular voice coils, this can expand the circumference of the voice coil by extending its side, achieving an equivalent effect to existing large-diameter circular voice coils. This allows for high power output, improved resonant frequency parameters, a smaller resonant frequency parameter value, and improved low-frequency extension, fullness, and elasticity. Simultaneously, by utilizing the physical motion performance of a wave-centering frame, it can effectively control the second and third harmonic distortion of the speaker cone vibration, which is beneficial for high power output while reducing the speaker's nonlinear distortion.

[0006] The above literature describes assembling a circular rectangular voice coil inside the loudspeaker. By extending the side of the circular rectangular voice coil, the circumference of the voice coil can be increased, thereby achieving high power output. However, the lengths of the circular side and the curved edge are different, resulting in different magnetic field strengths within the circular side and the curved edge. This causes the rectangular voice coil to encounter the problem of magnetic field inhomogeneity. When the voice coil is energized, the magnetic field it generates interacts with the magnetic field on the U-shaped iron, and the side and curved edge of the voice coil may jump asynchronously, thus affecting the linearity of the voice coil's movement. Furthermore, the voice coil is connected to a spider, which is located around the magnet, making it impossible to ensure the consistency of the spider's movement, thereby affecting the sound quality. Summary of the Invention

[0007] This invention provides a low-frequency speaker structure with good consistency of the wave motion and good sound quality.

[0008] To achieve the above objectives, the technical solution of this utility model is: a low-frequency speaker structure, including a frame, a U-shaped iron on the frame, a magnet on the U-shaped iron, a washer on the magnet, a cavity between the U-shaped iron and the side of the washer, a voice coil inside the cavity, the upper end of the voice coil being connected to the bottom of a dust cap, a receiving groove above the washer, a spring and a limiting post in the receiving groove, and the middle part of the spring being connected to the middle part of the dust cap through the limiting post.

[0009] The above setup includes a washer mounted on the U-shaped iron, a magnet positioned between the U-shaped iron and the washer, a receiving groove in the center of the washer containing a spring, and the spring connected to the center of the dust cap via a limiting post. The dust cap is positioned within the receiving groove. A voice coil is located within a cavity surrounding the magnet. The magnetic field formed between the voice coil and the magnet causes the spring and dust cap to move upwards or downwards together, producing sound. Because the spring is fixed within the receiving groove and secured to the dust cap by the limiting post, it can be more effectively driven to move evenly, resulting in superior sound quality. The volume is good, and because the spider is set on the magnet, there is more space on the outside of the magnet to accommodate a larger voice coil. The larger cross-section of the voice coil can form a larger magnetic field, which can generate a stronger driving force under the same current. This allows the cone to vibrate over a wider range, which helps to provide a stronger driving force at low frequencies. It can more effectively push more air, thus providing a lower frequency response. A lower low-frequency response is beneficial for creating a sense of immersion in the sound, improving the fidelity and clarity of the audio signal, and thus helping to obtain a lower frequency limit.

[0010] Furthermore, the basin frame is also equipped with a speaker cone, one end of which is connected to the basin frame and the other end of which is connected to a dust cap.

[0011] The above setup, where the dust cap is connected to the cone (i.e., the voice coil, dust cap, and cone are connected), helps to enhance the stability of the speaker structure, reduces deformation during vibration, and thus maintains the stability of the sound output.

[0012] Furthermore, the wave is arched upwards to form a convex frustum structure, and a perforation is provided in the middle of the wave.

[0013] The above configuration includes a perforation in the middle of the wave spring, which allows the limiting post to connect with the wave spring. The limiting post ensures that the wave spring vibrates effectively and evenly during movement, avoiding excessive local vibration, thereby reducing the occurrence of segmented vibration and making the wave spring less prone to deformation.

[0014] Furthermore, the limiting post includes an extension portion and a boss, the boss protruding outward from the outer side wall of the extension portion, the extension portion passing through the through hole, and the lower surface of the boss being connected to the spring wave.

[0015] With the above configuration, the limiting post extends into the through hole, allowing the lower surface of the boss to connect with the spring. This ensures a more secure and stable connection between the spring and the limiting post. The limiting post provides a connection point for the spring and the dust cap, making the speaker structure more compact and integrated. During speaker operation, the vibration generated by the voice coil is transmitted to the spring through the dust cap. The boss on the limiting post increases the contact area between the limiting post and the spring, effectively dispersing the stress exerted by the dust cap on the spring, thus making the spring less prone to deformation and extending its service life.

[0016] Furthermore, the cross-sectional area of ​​the inner wall of the voice coil is greater than the cross-sectional area of ​​the spider wave.

[0017] With the above settings, among speakers of the same size, a voice coil with a larger cross-sectional area helps improve the low-frequency response of the speaker, making the sound fuller and more powerful. At the same time, a larger voice coil also helps reduce distortion and improve the clarity and fidelity of the sound quality.

[0018] Furthermore, the dust cap is provided with a connecting hole at the position corresponding to the perforation, and the limiting post is set in the connecting hole.

[0019] The above features include a connection hole in the dust cap for easy installation of the limit post.

[0020] Furthermore, the receiving groove is recessed downwards from the top of the washer.

[0021] The above configuration, with the receiving groove recessed from top to bottom, allows the spring to be positioned within the receiving groove. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention.

[0023] Figure 2 This is the front view of the limiting post in this utility model.

[0024] Figure 3 This is an exploded view of the present invention.

[0025] Figure 4 This is a connection diagram of the present invention.

[0026] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0027] Figure 6 This is a top view of the spring wave in this utility model.

[0028] Explanation of reference numerals: 1-Dust cap; 11-Connecting hole; 2-Limiting post; 21-Boss; 22-Extension part; 3-Cone; 4-Frame; 5-U-shaped iron; 6-Magnet; 7-Washer; 71-Receiving groove; 8-Voice coil; 9-Cavity; 10-Spider; 101-Perforation. Detailed Implementation

[0029] Example 1.

[0030] like Figure 1-6As shown, a low-frequency speaker structure includes a frame 4, a U-shaped iron 5 mounted on the frame 4, a magnet 6 mounted on the U-shaped iron 5, a washer 7 mounted on the magnet 6, a cavity 9 between the U-shaped iron 5 and the side of the washer 7, a receiving groove 71 in the middle of the upper part of the washer 7, the receiving groove 71 being recessed downward from the top of the washer 7, a spring 10 disposed within the receiving groove 71, a limiting post 2 including an extension part and a boss 21, the spring 10 being connected to the lower surface of the boss 21, a voice coil 8 disposed within the cavity 9, the voice coil 8 bouncing within the cavity 9, and the upper end of the voice coil 8 being connected to the lower surface of the boss 21. The bottom of the dust cap 1 is connected, and the middle part of the dust cap 1 is connected to the upper surface of the boss 21. A washer 7 is provided on the U-shaped iron 5, and a magnet 6 is provided between the U-shaped iron 5 and the washer 7. The upper surface of the spring 10 is connected to the lower surface of the boss 21. A voice coil 8 is provided in the cavity 9. The voice coil 8 can jump in the cavity 9. That is, the voice coil 8 is sleeved on the outside of the washer 7 and the magnet frame. The spring 10 is set inside the washer 7, and the voice coil 8 is sleeved on the outside of the washer 7. The upper side of the voice coil 8 is connected to one end of the dust cap 1, and the other end of the dust cap 1 is connected to the upper surface of the boss 21.

[0031] Because the spider 10 is placed inside the receiving slot 71, there is no need to connect the voice coil 8 to the spider 10, thus affecting the size of the voice coil 8. Using the above structure in a speaker of the same size allows for a larger cross-sectional area of ​​the cavity 9, which in turn allows for a larger cross-sectional area of ​​the voice coil 8. A larger voice coil 8 can cover a larger magnetic field area, generating a stronger driving force under the same current, allowing the cone 3 to vibrate over a wider range. This helps to provide a stronger driving force at low frequencies, more effectively pushing more air, thus providing a lower frequency response. A lower low-frequency response is beneficial for creating a sense of immersion in the sound. Furthermore, the increased cross-sectional area of ​​the voice coil 8, i.e., the corresponding increase in the cross-sectional area of ​​the connection point between the voice coil 8 and the dust cap 1 or the cone 3, prevents deviation between the left and right sides of the cone 3 during movement, minimizing split vibration, improving the fidelity and clarity of the audio signal, and thus helping to obtain a lower frequency limit.

[0032] like Figure 2-5 As shown, a cone 3 is also provided on the frame 4. One end of the cone 3 is connected to the frame 4, and the other end of the cone 3 is connected to the dust cap 1. The dust cap 1 is connected to the cone 3. That is, the voice coil 8, the dust cap 1 and the cone 3 are connected, which helps to enhance the stability of the speaker structure, helps to reduce deformation during vibration, and thus maintains the stability of the sound output.

[0033] The limiting post 2 is provided with an extension part 22, and the dust cap 1 is provided with a connecting hole 11 in the middle. The extension part 22 passes into the through hole 101, so that the lower surface of the boss 21 can be connected with the spring 10. This ensures that the connection between the spring 10 and the limiting post 2 is more firm and stable. The setting of the limiting post 2 provides a connection position for the spring 10 and the dust cap 1, making the speaker structure more compact and integrated. During the operation of the speaker, the vibration generated by the voice coil 8 will be transmitted to the spring 10 through the dust cap 1. The setting of the boss on the limiting post 2 effectively disperses the stress of the dust cap 1 acting on the spring 10, thereby making the spring 10 less prone to deformation and extending the service life of the spring 10.

[0034] The cross-sectional area of ​​the inner wall of the voice coil 8 is larger than that of the spider 10, which allows the voice coil 8 to be placed on the outside of the magnet 6. In a speaker of the same size, the voice coil 8 with a larger cross-sectional area helps to improve the low-frequency response of the speaker, making the sound fuller and more powerful. At the same time, the larger voice coil 8 also helps to reduce distortion and improve the clarity and fidelity of the sound quality.

[0035] The limiting post 2 is made of ABS material. The speaker generates heat when it is working. ABS material has good heat resistance and can maintain stable performance in high temperature environments.

[0036] like Figure 6 As shown, the spring wave 10 arches upwards to form a convex frustum structure. A through hole 101 is provided in the middle of the spring wave 10, which allows the lower surface of the protrusion 21 of the limiting post 2 to connect with the spring wave 10. The setting of the limiting post 2 enables the spring wave 10 to vibrate effectively and uniformly during the movement, avoiding excessive local vibration, thereby reducing the occurrence of segmented vibration, and making the spring wave 10 less prone to deformation.

[0037] The working principle of this utility model is as follows: A U-shaped iron 5 is provided on the frame 4, a washer 7 is provided on the U-shaped iron 5, a magnet 6 is provided between the U-shaped iron 5 and the washer 7, a receiving groove 71 is provided in the middle of the washer 7, a spring 10 is provided in the receiving groove 71, the upper surface of the spring 10 is connected to the lower surface of the boss 21, a voice coil 8 is provided in the cavity 9, the voice coil 8 can jump within the cavity 9, that is, the voice coil 8 is sleeved on the outside of the washer 7 and the magnet frame, the spring 10 is set inside the washer 7, and the voice coil 8 is sleeved on the cavity 9. Outside the washer 7, and on the upper side of the voice coil 8 connected to one end of the dust cap 1, the middle of the dust cap 1 is connected to the upper surface of the boss 21, so that the spider is located in the middle rather than on the outside of the magnet 6. Since the spider 10 is fixed in the receiving groove 71 and fixed to the dust cap 1 by the limiting post 2, it can better drive the spider 10 to move evenly, resulting in good sound quality. Because the spider 10 is located on the washer 7, the outer side of the washer 7 has more space to accommodate a larger one. The voice coil 8 has a larger cross-section, which can generate a larger magnetic field. Using this structure in a speaker of the same size, the cross-sectional area of ​​the cavity 9 can be increased due to the voice coil being placed inside the cavity 9, thus allowing for a larger cross-sectional area of ​​the voice coil 8. The larger voice coil 8 can cover a larger magnetic field area, generating a stronger driving force under the same current, allowing the cone 3 to vibrate over a wider range. This helps to provide a stronger driving force at low frequencies, more effectively pushing more air, thus providing a lower frequency response. A lower low-frequency response is beneficial for creating a sense of immersion in the sound. Furthermore, the increased cross-sectional area of ​​the voice coil 8, i.e., the increased cross-sectional area of ​​the dust cap 1 or the connection point of the cone 3, prevents deviation between the left and right sides of the cone 3 during movement, minimizing split vibration, improving the fidelity and clarity of the audio signal, and thus helping to obtain a lower frequency limit.

Claims

1. A low-frequency speaker structure, comprising a frame, a U-shaped iron disposed on the frame, a magnet disposed on the U-shaped iron, a washer disposed on the magnet, and a cavity provided between the U-shaped iron and the side of the washer, characterized in that: A voice coil is provided inside the cavity, and the upper end of the voice coil is connected to the bottom of the dust cap. A receiving groove is provided above the washer, and the receiving groove is provided with a spring and a limiting post. The middle part of the spring is connected to the middle part of the dust cap through the limiting post.

2. The low-frequency speaker structure according to claim 1, characterized in that: The basin frame is also equipped with a speaker cone, one end of which is connected to the basin frame and the other end of which is connected to a dust cap.

3. The low-frequency speaker structure according to claim 1, characterized in that: The wave is arched upwards in the shape of a convex frustum, and a perforation is provided in the middle of the wave.

4. The low-frequency speaker structure according to claim 3, characterized in that: The limiting post includes an extension part and a boss. The boss protrudes outward from the outer side wall of the extension part. The extension part passes through the through hole, and the lower surface of the boss is connected to the spring.

5. A low-frequency speaker structure according to claim 1, characterized in that: The cross-sectional area of ​​the inner wall of the voice coil is greater than the cross-sectional area of ​​the spider wave.

6. The low-frequency speaker structure according to claim 1, characterized in that: The dust cap has a connection hole at the position corresponding to the perforation, and the limiting post is set in the connection hole.

7. A low-frequency speaker structure according to claim 1, characterized in that: The receiving groove is recessed downwards from the top of the washer.

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