Star-shaped magnetic circuit loudspeaker

Abstract

The utility model relates to a star-shaped magnetic circuit loudspeaker, comprising a plurality of magnets which are uniformly arranged on T iron; the washer is arranged between the top of the washer and the top of the magnet, forms a magnetic circuit with the T iron and the magnet, and is used for providing a required uniform magnetic field; the voice coil is arranged on the inner wall of the washer and is connected with the magnet; the basin stand is mounted on the outer side of the top of the washer and used for bearing and connecting the magnetic circuit structure; the gasket is arranged at the top of the basin stand; and the drum paper is connected between the gasket and the voice coil. According to the utility model, a common high-power neodymium iron boron external magnetic circuit is changed into a neodymium iron boron star-shaped external magnetic circuit, so that enough magnetic gaps are formed between the magnets, and when the loudspeaker vibrates, the flowing speed of air is effectively increased, thereby reducing the temperature inside the magnetic circuit, prolonging the service life of the voice coil and the damper, and improving the bearing capacity of the voice coil and the damper; in addition, the basin frame is arranged to be hollow, so that when the loudspeaker vibrates, the flow speed of air is increased through the star-shaped magnetic circuit, the temperature in the magnetic circuit is reduced, and effective heat dissipation is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of loudspeakers, and in particular relates to a star-shaped magnetic circuit loudspeaker. Background Art

[0002] A speaker is a transducer device that converts electrical signals into sound signals. In audio equipment, the speaker is a relatively weak device, but for sound effects, it is a relatively important part. It mainly generates audio electricity, and then uses piezoelectric or electrostatic effects to make its paper cone or diaphragm vibrate, and resonate (or resonate) with the surrounding air to make sound.

[0003] A Chinese patent with publication number CN202121381203.1 discloses a high-power ultra-thin speaker, which adopts an inverted concave R suspension edge structure and two linear composite structures on the drum paper structure, solving the problem of traditional speakers having high distortion and poor low-frequency effects under high power conditions due to height limitations. However, there is still the problem of poor heat dissipation of the magnetic circuit under high power conditions. Utility Model Content

[0004] The purpose of the utility model is to provide a star-shaped magnetic circuit speaker which can ensure heat dissipation even under high-power operation, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a star-shaped magnetic circuit speaker, comprising:

[0006] There are multiple magnets, which are evenly installed on the T iron;

[0007] Washers are provided between the tops of the magnets, forming a magnetic circuit with the T-irons and the magnets to provide the required uniform magnetic field;

[0008] A voice coil, disposed on the inner wall of the washer and connected to the magnet;

[0009] A basin frame is installed on the top outer side of the washer and is used to support and connect the magnetic circuit structure;

[0010] A gasket is provided on the top of the basin frame;

[0011] Drum paper, connected between the gasket and the voice coil, used to vibrate with the voice coil and produce sound by friction with the air;

[0012] A spring wave connected between the voice coil and the basin frame, and used to fix the voice coil;

[0013] A dust cap is provided on the top of the voice coil to protect sensitive components inside the speaker.

[0014] Preferably, the T-iron includes a base and a columnar member extending upward from the base.

[0015] Preferably, a plurality of circular mounting grooves are provided on the outer side of the top of the base for mounting the magnets.

[0016] Preferably, the magnets are distributed in a star shape, the number of which is 15, and magnetic gaps are formed between the magnets to provide the required uniform magnetic field for the movement of the voice coil.

[0017] Preferably, the basin frame is hollow.

[0018] Preferably, the gasket may be provided in one piece or in multiple pieces.

[0019] Preferably, the spring wave is located below the drum paper.

[0020] Preferably, the dust cap is set to have a larger diameter than the voice coil.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention changes the general high-power NdFeB external magnetic circuit into a NdFeB star-shaped outer magnetic circuit, so that a sufficient number of magnetic gaps are formed between the magnets, which effectively increases the air flow rate when the speaker vibrates, thereby reducing the temperature inside the magnetic circuit and improving the service life and bearing capacity of the voice coil and the elastic wave; the basin frame is also set to be hollow, so that when the speaker vibrates, the air flow rate is increased through the star-shaped magnetic circuit, the temperature inside the magnetic circuit is reduced, and effective heat dissipation is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the main three-dimensional structure of the utility model;

[0023] Figure 2 It is an exploded view of the utility model;

[0024] Figure 3 It is a cross-sectional view of the utility model;

[0025] Figure 4 It is a schematic diagram of the star-shaped magnetic circuit in the utility model.

[0026] Numbers in the figure: 1-magnet, 2-T iron, 21-base, 22-columnar part, 211-mounting circular groove, 3-washer, 4-voice coil, 5-basin frame, 6-gasket, 7-drum paper, 8-spring wave, 9-dust cap, 10-magnetic gap. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1

[0029] like Figures 1 to 4 A star-shaped magnetic circuit speaker shown in the figure includes a magnet 1, which is provided in multiple numbers and is evenly installed on a T-iron 2; a washer 3, which is provided between the top of the magnet 1, and forms a magnetic circuit with the T-iron 2 and the magnet 1, for providing the required uniform magnetic field; a voice coil 4, which is provided on the inner wall of the washer 3 and connected to the magnet 1; a basin frame 5, which is installed on the top outer side of the washer 3, for carrying and connecting the magnetic circuit structure; a washer 6, which is provided on the top of the basin frame 5; a drum paper 7, which is connected between the washer 6 and the voice coil 4, for vibrating with the voice coil 4 and generating sound by friction with the air; a spring 8, which is connected between the voice coil 4 and the basin frame 5, for fixing the voice coil 4; and a dust cap 9, which is provided on the top of the voice coil 4, for protecting the sensitive components inside the speaker. The T-iron 2 includes a base 21 and a columnar member 22 extending upward from the base 21. A plurality of mounting circular grooves 211 are provided on the top outer side of the base 21 for mounting the magnet 1. The magnets 1 are arranged in a star shape, the number is 15, and a magnetic gap 10 is formed between the magnets 1 to provide the required uniform magnetic field for the movement of the voice coil 4. The basin frame 5 is hollow. The gasket 6 can be any one of a whole piece setting or a multi-piece splicing setting. The spring 8 is located under the drum paper 7. The dust cap 9 is a large-diameter setting larger than the voice coil 4.

[0030] The utility model changes the general high-power NdFeB outer magnetic circuit into a NdFeB star-shaped outer magnetic circuit, so that a sufficient number of magnetic gaps 10 are formed between the magnets 1 and 1, and the flow speed of the air is effectively increased when the speaker vibrates, thereby reducing the temperature inside the magnetic circuit and improving the service life and bearing capacity of the voice coil 4 and the elastic wave 8; the basin frame 5 is also set to be hollow, so that when the speaker vibrates, the flow speed of the air is increased through the star-shaped magnetic circuit, the temperature inside the magnetic circuit is reduced, and effective heat dissipation is achieved.

[0031] Example 2

[0032] like Figures 1 to 4A star-shaped magnetic circuit speaker shown includes a magnet 1, which is provided in multiple numbers and evenly installed on a T-iron 2. The T-iron 2 specifically includes a base 21 and a columnar member 22 extending upward from the base 21, which can not only provide sufficient space to accommodate components such as the magnet 1 and the voice coil 4, but also has multiple mounting circular grooves 211 on the top of the base 21 for mounting the magnet 1, which indirectly determines the size and shape of the magnetic gap 10 for achieving high-power operation. At the same time, the T-iron 2 has the characteristic of no residual magnetism on the basis of magnetic conductivity, and then when the speaker is powered off, the magnetic field will disappear immediately, ensuring the safety and stability of the speaker.

[0033] In the utility model, the specific shape of the magnet 1 is cylindrical, and the material is neodymium iron boron. Compared with the traditional ferrite material, the magnetism is several times that of the above ferrite, and it can provide a strong magnetic field in a smaller volume, greatly improving the fidelity and signal-to-noise ratio of the sound. A washer 3 is provided between the top of the magnet 1, and the washer 3, the T iron 2, and the magnet 1 form a magnetic circuit, wherein the washer 3 must be low-carbon steel with a very low carbon content to reduce the magnetic resistance and provide the required uniform magnetic field for the movement of the voice coil 4; and when the washer 3 is missing in the magnetic circuit, it means that there is no uniform magnetic field, which will lead to a decrease in the sensitivity of the speaker and an increase in distortion, thereby affecting the sound quality.

[0034] Example 3

[0035] In Example 2, the specific shape of the magnet 1 is set to be cylindrical, and it is located between the T iron 2 and the washer 3. The three cooperate to form a magnetic circuit. The inner wall of the washer 3 is provided with a voice coil 4 and connected to the magnet 1. In common high-power operation, it is inevitable that the magnetic circuit will overheat, and the overheating of the magnetic circuit will not only reduce the magnetic flux, but also reduce the sound pressure level (volume) of the speaker and deteriorate the sound quality; it will even cause the magnetic circuit to be unable to withstand higher power input. In this case, even if the speaker is designed to withstand a certain power level when it leaves the factory, due to poor heat dissipation, the power still needs to be reduced in actual use to avoid overheating of the magnetic circuit, which inevitably limits the maximum volume of the speaker; and after forcing the speaker to operate at high power for a long time, the overheating of the magnetic circuit will also accelerate the aging of the magnet 1 and the magnetic material, resulting in performance degradation and shortened life.

[0036] Therefore, in this embodiment, the NdFeB external magnetic circuit of a general long-stroke, high-power speaker is changed into a NdFeB star-shaped outer magnetic circuit, that is, a certain number of magnets 1 are evenly installed on the outer side of the top of the T-iron 2, and the number can be controlled and installed according to actual needs, and the gap between the magnets 1 is continuously adjusted; further, in this embodiment, 15 magnets 1 are arranged, and 15 magnetic gaps 10 are formed between the magnets 1. When enough magnetic gaps 10 are formed between the magnets 1, the air flow rate can be increased when the speaker vibrates, thereby reducing the temperature inside the magnetic circuit, achieving effective heat dissipation, and ensuring high-power output of the magnetic circuit. At the same time, damage to other components (such as voice coil 4 and insulating materials) can be avoided, thereby improving the service life and bearing capacity of the speaker and improving the performance of the magnet 1.

[0037] Example 4

[0038] like Figures 1 to 4 In the star-shaped magnetic circuit speaker shown, a basin frame 5 is installed at the outer side of the top of the washer 3. The basin frame 5 is used to carry the magnets, magnetic conductive elements and other components in the speaker, and is also used to connect the magnetic circuit structure to ensure that the speaker can be used normally; the basin frame 5 is mostly stamped from galvanized steel plates. Due to its own hardness, it can ensure the overall stability. Reinforcement ribs can also be set on the edge of the basin frame 5 to ensure its performance; but considering the insulation properties between the pelvis and the voice coil 4, to avoid the safety hazards caused by the conduction of the basin frame 5, the utility model uses metal as the material for the basin frame 5, but is not limited to metal. The specific situation depends on the production cost and market demand. The basin frame 5 is hollow, so that when the speaker vibrates, the air flow rate is increased through the star-shaped magnetic circuit, the temperature inside the magnetic circuit is reduced, and effective heat dissipation is achieved.

[0039] A gasket 6 is provided on the top of the basin frame 5. The design and shape of the gasket 6 will vary according to the specific sound system, speaker type and installation requirements. The gasket 6 can be a whole piece or a plurality of pieces spliced ​​together. When the plurality of pieces are spliced ​​together, it is convenient to repair the drum paper 7. The drum paper 7 is connected between the gasket 6 and the voice coil 4, which is used to vibrate with the voice coil 4 and produce sound by friction with the air. The gasket 6 can play a role of sealing and shock absorption at this time. When the speaker vibrates, it protects the surface of the connected part from being scratched by the nut and disperses the pressure of the nut on the connected part. At the same time, it can disperse this vibration and reduce resonance, thereby ensuring that the sound effect of the speaker is not affected.

[0040] A spring 8 is provided between the voice coil 4 and the basin frame 5 and below the drum paper 7 to fix the voice coil 4, prevent the voice coil 4 from shaking left and right, and ensure that the voice coil 4 reciprocates in the vertical direction. A dust cap 9 is also provided on the top of the voice coil 4, and is larger in diameter than the voice coil 4, to prevent dust and other small particles from entering the speaker, protecting the sensitive components inside the speaker; it can also serve as a part of the diaphragm. When the speaker is sounding, the dust cap 9 can participate in the vibration and propagation of the sound, thereby extending the stroke of the speaker and extending the propagation range of the sound.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0042] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A star-shaped magnetic circuit speaker, characterized in that: include: There are multiple magnets, which are evenly installed on the T iron; Washers are provided between the tops of the magnets, forming a magnetic circuit with the T-irons and the magnets to provide the required uniform magnetic field; A voice coil, disposed on the inner wall of the washer and connected to the magnet; A basin frame is installed on the top outer side of the washer and is used to support and connect the magnetic circuit structure; A gasket is provided on the top of the basin frame; Drum paper, connected between the gasket and the voice coil, used to vibrate with the voice coil and produce sound by friction with the air; A spring wave connected between the voice coil and the basin frame, and used to fix the voice coil; A dust cap is provided on the top of the voice coil to protect sensitive components inside the speaker.

2. A star-shaped magnetic circuit speaker according to claim 1, characterized in that: The T iron comprises a base and a columnar member extending upward from the base.

3. A star-shaped magnetic circuit speaker according to claim 2, characterized in that: A plurality of circular mounting grooves are arranged on the outer side of the top of the base for mounting the magnets.

4. A star-shaped magnetic circuit speaker according to claim 3, characterized in that: The magnets are distributed in a star shape, with 15 in number, and magnetic gaps are formed between the magnets to provide the required uniform magnetic field for the movement of the voice coil.

5. The star-shaped magnetic circuit speaker according to claim 1, characterized in that: The basin frame is hollow.

6. A star-shaped magnetic circuit speaker according to claim 1, characterized in that: The gasket can be a whole piece or a plurality of pieces spliced ​​together.

7. The star-shaped magnetic circuit speaker according to claim 1, characterized in that: The spring wave is located below the drum paper.

8. The star-shaped magnetic circuit speaker according to claim 1, characterized in that: The dust cap is set to have a larger diameter than the voice coil.

Images