Loudspeaker with multi-core magnetic circuit

Abstract

The utility model provides a multi-core magnetic circuit loudspeaker comprising a T iron and a washer, a magnetic circuit assembly is arranged between the T iron and the washer, the magnetic circuit assembly comprises more than two first magnets, one end of each first magnet is connected with the T iron, the other end of each first magnet is connected with the washer, the first magnets are uniformly distributed along the axis of the T iron, and the T iron is connected with the washer. And the magnetic flux is improved and the heat dissipation effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of audio processing devices, and particularly relates to a loudspeaker with a multi-core magnetic circuit. Background Art

[0002] With the continuous development of social economy, the scenarios of using audio devices are becoming more and more frequent, and the requirements for audio devices are also getting higher and higher. As an important part of audio devices, the T-iron, also known as the yoke or magnetic yoke, is an important component in a loudspeaker. It not only supports the magnet, but also acts together with the magnet to generate a magnetic field, driving the voice coil and the diaphragm to vibrate, thereby emitting sound. Therefore, the distribution and heat dissipation design of the magnet on the T-iron are crucial for the performance of the loudspeaker.

[0003] For example, in the patent document with the patent application number 202120474492.3 and the publication date of October 19, 2021, a loudspeaker is disclosed, which includes a vibration system and a magnetic circuit system. The vibration system includes a voice coil that can vibrate under the action of the magnetic field of the magnetic circuit system and a diaphragm driven by the voice coil. The magnetic circuit system includes a first magnetic circuit component, and the first magnetic circuit component includes a plurality of first magnets. The diaphragm is arranged on one side in the first direction of the magnetic circuit system, and the first magnets are circumferentially distributed along the first direction. The voice coil surrounds the periphery of the first magnetic circuit component and corresponds to the outer shape of the distribution of the first magnets. Through the specific arrangement of the magnetic circuit system and the cooperative setting of the voice coil, the magnetic field is enhanced, and the sensitivity of the loudspeaker is improved.

[0004] In the above literature, by changing the magnet structure to enhance the overall sensitivity of the loudspeaker, a first magnet is provided in the magnetic circuit system, and the first magnets are arranged in a cross shape, and a second magnet is provided around the first magnet. The second magnets are distributed around the first magnet. The first magnet and the second magnet are arranged in a square shape. When the loudspeaker emits sound, the first magnet and the second magnet in the magnetic circuit system will generate heat. There is contact between the first magnets, and these heats will be transferred through the contact surface, causing the heat to be transferred between the first magnets. Moreover, the second magnets are distributed around the first magnet, making it difficult for the heat of the first magnet to dissipate, resulting in the temperature of the first magnet gradually rising, thereby affecting the magnetic field strength and uniformity of the loudspeaker, and further affecting the sound quality. At the same time, in this literature, since the second magnets are only arranged around the four corners of the first magnet, a magnetic flux is formed between the second magnets and the first magnet, but there is no second magnet arranged at the top of the cross-shaped first magnet, so no magnetic flux can be formed, resulting in a decrease in magnetic field strength, and there is only a small amount of magnetic field at the top of the cross-shaped first magnet, thus reducing the uniformity of the magnetic field. Summary of the Invention

[0005] The utility model provides a loudspeaker with a multi-core magnetic circuit, which can improve the magnetic flux and has a good heat dissipation effect.

[0006] To achieve the above object, the technical solution of the present utility model is: a multi-core magnetic circuit loudspeaker, including a T-iron and a washer, a magnetic circuit component is arranged between the T-iron and the washer, the magnetic circuit component includes more than two first magnets, a voice coil is arranged between the first magnet and the T-iron, one end of the first magnet is connected to the T-iron, the other end of the first magnet is connected to the washer, more than two first magnets are evenly spaced along the outer side of the axis of the T-iron, the first magnet includes a first magnetic block and a second magnetic block, and the first magnetic block and the second magnetic block on adjacent first magnets are arranged oppositely.

[0007] With the above settings, a magnetic circuit component is arranged between the washer and the T-iron. The magnetic circuit component includes multiple first magnets, and the multiple first magnets are spaced apart. When the loudspeaker works, since the two first magnets do not contact each other, there will be no contact heat transfer between the first magnets, and heat dissipation can be carried out by the surrounding cavity, which can effectively take away the heat from the surface of the first magnet, thereby preventing the first magnet from overheating. And because the two magnetic blocks on adjacent first magnets are arranged oppositely, a magnetic field can be formed between adjacent first magnets, and a magnetic field will also be formed between non-adjacent first magnets. Therefore, the magnetic induction lines between the two first magnets will be superimposed on each other, thereby enhancing the magnetic field strength and increasing the magnet density. When an electric current is passed through the voice coil component arranged between the first magnet and the T-iron, enough magnetic field lines can be cut, so that the voice coil component moves up and down, ensuring the sound quality of the loudspeaker.

[0008] Further, a pillar is arranged in the middle of the T-iron, and a first cavity is left between the first magnet and the pillar.

[0009] With the above settings, a first cavity is left between the first magnet and the pillar. The first cavity allows the voice coil to be arranged therein, and the first cavity provides a heat dissipation space for the first magnet, so that the heat of the first magnet can flow through the first cavity in time, preventing heat from accumulating between the voice coil and the first magnet.

[0010] Further, a second cavity is left between two adjacent first magnets.

[0011] With the above settings, due to the setting of the second cavity, there will be no contact heat transfer between the two first magnets, so that the heat will not be transferred from one first magnet to another first magnet, and the heat can also flow through the second cavity to help the first magnet dissipate heat. Due to the interaction of the magnetic fields, the magnetic induction lines in the second cavity will be superimposed on each other, which helps to improve the working efficiency of the voice coil and the quality of the sound output.

[0012] Further, the first magnet includes an upper magnet part and a lower magnet part, and the cross-sectional area of the upper magnet part is larger than that of the lower magnet part.

[0013] In the above arrangement, since the voice coil can be arranged in the first cavity, when the voice coil moves away from the bottom of the T-iron, the interaction area between the voice coil and the first magnet becomes smaller, and the magnetic induction lines decrease, thereby affecting the sound quality. By increasing the cross-sectional area of the upper part of the magnet, the magnetic induction lines can be more concentrated on the upper part of the magnet, thereby generating a larger magnetic field, ensuring the sound quality of the speaker. At the same time, by making the area of the upper part of the magnet larger than the area of the lower part of the magnet, it is convenient to increase the connection area between the voice coil and the washer, thereby ensuring the reliability of the connection.

[0014] Furthermore, the upper portion of the magnet and the lower portion of the magnet are both cylindrical.

[0015] With the above arrangement, the cylindrical magnet can generate a more uniform magnetic field around the first magnet, so that the magnetic field is more concentratedly distributed on the voice coil, thereby improving the clarity and accuracy of the sound. The cylindrical magnet provides a larger surface area, which helps to better dissipate the heat generated by the current.

[0016] Furthermore, the washer is a hollow ring structure, a through hole is set in the middle of the washer, one end of the pillar is exposed through the through hole, there is a gap between the outer wall of the pillar and the inner wall of the through hole, and the upper two sides of the magnet extend out of the inner wall of the washer through hole and the outer wall of the washer.

[0017] In the above configuration, the upper part of the magnet extends out of the washer ring plate on both sides to maximize the magnetic field strength while ensuring the reliability of the connection between the upper part of the magnet and the washer. In addition, the upper part of the magnet is closer to the voice coil, allowing more magnetic induction lines to drive the voice coil, and can also provide better support for the washer, increasing the stability and durability of the entire structure.

[0018] Furthermore, the number of the first magnets is eight.

[0019] In the above configuration, the number of the first magnets is set to 8, which can ensure the heat dissipation effect as much as possible while also maximizing the magnetic flux. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 This is one of the exploded views of the present invention.

[0022] Figure 3 This is the second exploded view of the present invention.

[0023] Figure 4 It is a top view of the utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the utility model connected with a voice coil.

[0025] Description of the reference numerals in the attached drawings: 1 - washer; 2 - magnetic circuit assembly; 21 - first magnet; 211 - upper part of the magnet; 212 - lower part of the magnet; 2111 - first magnetic block; 2112 - second magnetic block; 3 - T-shaped iron; 31 - pillar; 4 - first cavity; 5 - second cavity; 6 - voice coil. Detailed implementation manners

[0026] As Figures 1-4 shown, a loudspeaker with a multi-core magnetic circuit includes a T-shaped iron 3 and a washer 1. A magnetic circuit assembly 2 is provided between the T-shaped iron 3 and the washer 1. The magnetic circuit assembly 2 includes more than two first magnets 21. One end of the first magnet 21 is connected to the T-shaped iron 3, and the other end of the first magnet 21 is connected to the washer 1. The first magnets 21 are evenly spaced along the outer side of the axis of the T-shaped iron 3. A magnetic circuit assembly 2 is provided between the washer 1 and the T-shaped iron 3. The first magnet 21 includes a first magnetic block 2111 and a second magnetic block 2112, and the first magnetic blocks 2111 and the second magnetic blocks 2112 on adjacent first magnets 21 are arranged oppositely. A voice coil is provided between the magnetic circuit assembly 2 and the T-shaped iron 3. In this embodiment, the magnetic circuit assembly 2 includes eight first magnets 21. The first magnetic block 2111 is an N-polar magnetic block, and the second magnetic block 2112 is an S-polar magnetic block. When the loudspeaker works, since the two first magnets 21 do not contact each other, there will be no contact heat transfer between the first magnets 21, and heat can be dissipated by the surrounding cavities, which can effectively take away the heat from the surface of the first magnet 21, thereby preventing the first magnet 21 from overheating. And due to the interaction of the magnetic fields, the magnetic induction lines between the two first magnets 21 will be superimposed on each other, thereby enhancing the magnetic field strength and increasing the magnet density, ensuring the sound quality of the loudspeaker.

[0027] As Figures 1-2 shown, the T-shaped iron 3 is provided with a pillar 31. A first cavity 4 is left between the first magnet 21 and the pillar 31. A first cavity 4 is left between the first magnet 21 and the pillar 31. The first cavity 4 allows the voice coil to be arranged therein, and the first cavity 4 provides a heat dissipation space for the first magnet 21, so that the heat of the first magnet 21 can flow through the first cavity 4 in time, preventing heat from accumulating between the voice coil and the first magnet 21.

[0028] As Figures 3-4 shown, a second cavity 5 is left between two adjacent first magnets 21. Due to the setting of the second cavity 5, there will be no contact heat transfer phenomenon between the two first magnets 21, so that heat will not be transferred from one first magnet 21 to another first magnet 21, and the heat can also flow through the second cavity 5 to help the first magnet 21 dissipate heat. Due to the interaction of the magnetic fields, the magnetic induction lines in the second cavity 5 will be superimposed on each other, which helps to improve the working efficiency of the voice coil and the quality of sound output.

[0029] The first magnet 21 is divided into an upper magnet part 211 and a lower magnet part 212. The cross-sectional area of the upper magnet part 211 is larger than that of the lower magnet part 212. Since the voice coil can be arranged in the first cavity 4, when the voice coil vibrates, when the voice coil moves away from the bottom of the pole piece 3, the acting area between the voice coil and the first magnet 21 becomes smaller, and the magnetic induction lines decrease, thus affecting the sound quality. By increasing the cross-sectional area of the upper magnet part 211, the magnetic induction lines can be more concentrated in the upper magnet part 211, thereby generating a larger magnetic field to ensure the sound quality of the speaker.

[0030] Both the upper magnet part 211 and the lower magnet part 212 are cylindrical. The cylindrical magnet can generate a more uniform magnetic field, making the magnetic field more concentratedly distributed on the voice coil, thereby improving the clarity and accuracy of the sound. The cylindrical magnet provides a larger surface area, which helps to better dissipate the heat generated by the current.

[0031] A through hole 10 is provided in the middle of the spacer 1. The inner and outer sides of the upper magnet part 211 extend out of the inner side wall of the through hole 10 of the spacer 1 and the outer side wall of the spacer 1, and the upper magnet part 211 is closer to the voice coil, so that more magnetic induction lines drive the voice coil, and it can also provide better support for the spacer 1, increasing the stability and durability of the whole structure.

[0032] The working principle of the present utility model: A magnetic circuit assembly 2 is arranged between the spacer 1 and the pole piece 3. The magnetic circuit assembly 2 includes eight first magnets 21. When the speaker works, the eight first magnets 21 are evenly spaced along the circumference of the axis of the pole piece 3. A first cavity 4 is left between the first magnet 21 and the support column 31. The first cavity 4 allows the voice coil to be arranged therein, and the first cavity 4 provides a heat dissipation space for the first magnet 21. A second cavity 5 is left between two first magnets 21. Due to the setting of the second cavity 5, the phenomenon of contact heat transfer does not occur between the two first magnets 21, ensuring the heat dissipation efficiency of the speaker. Since the two polar magnetic blocks on the adjacent first magnets are arranged opposite to each other, a magnetic field is formed between the two adjacent first magnets, and a magnetic field is also formed between the other two first magnets, thereby realizing the interaction of the magnetic fields. The magnetic induction lines in the second cavity 5 will be superimposed on each other, which helps to improve the working efficiency of the voice coil and the quality of the sound output.

Claims

1. A loudspeaker with a multi-core magnetic circuit, comprising a T-iron and a washer, characterized in that: A magnetic circuit component is arranged between the T-iron and the washer. The magnetic circuit component includes more than two first magnets. A voice coil is arranged between the first magnet and the T-iron. One end of the first magnet is connected to the T-iron, and the other end of the first magnet is connected to the washer. More than two first magnets are evenly spaced along the outside of the axis of the T-iron. The first magnet includes a first magnetic block and a second magnetic block, and the first magnetic block and the second magnetic block on adjacent first magnets are arranged oppositely.

2. The loudspeaker with a multi-core magnetic circuit according to claim 1, characterized in that: A pillar is arranged in the middle of the T-iron, and a first cavity is left between the first magnet and the pillar.

3. The loudspeaker with a multi-core magnetic circuit according to claim 1, characterized in that: A second cavity is left between two adjacent first magnets.

4. The loudspeaker with a multi-core magnetic circuit according to claim 1, characterized in that: The first magnet includes an upper magnet part and a lower magnet part, and the cross-sectional area of the upper magnet part is larger than that of the lower magnet part.

5. The loudspeaker with a multi-core magnetic circuit according to claim 4, characterized in that: Both the upper magnet part and the lower magnet part are cylindrical.

6. The loudspeaker with a multi-core magnetic circuit according to claim 4, characterized in that: The washer is a hollow ring structure, a through hole is arranged in the middle of the washer, one end of the pillar passes through the through hole and is exposed, and there is a gap between the outer side wall of the pillar and the inner side wall of the through hole. The two sides of the upper magnet part extend out of the inner side wall and the outer side wall of the through hole of the washer.

7. The loudspeaker with a multi-core magnetic circuit according to claim 1, characterized in that: The number of the first magnets is eight.

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