Magnetic circuit structure with efficient heat dissipation

Abstract

The utility model discloses a magnetic circuit structure with efficient heat dissipation. The magnetic circuit structure comprises a voice coil, a washer, a magnet and T iron, a first semi-closed space is defined between the inner wall of the magnet and the outer wall of the T iron; an annular gap is defined between the inner wall of the washer and the outer wall of the T iron; the inner wall of the voice coil and the upper end face of the T iron form a second semi-closed space. The bottom of the T iron is provided with an air hole and a hollow channel corresponding to the first semi-closed space and the second semi-closed space respectively. The air hole is communicated with the first semi-closed space; the hollow channel is communicated with the second semi-closed space; when the voice coil moves downwards, the first semi-closed space and the second semi-closed space enter and exit through the air holes and the hollow channel respectively, and generation of air flow in the opposite direction is avoided. Therefore, high-temperature air in the first semi-closed space and the second semi-closed space can be smoothly exchanged with external low-temperature air, heat generated by the voice coil can be timely discharged, air circulation is facilitated, and heat dissipation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technology of the loudspeaker field, in particular to a magnetic circuit structure with high-efficiency heat dissipation. Background Art

[0002] As a common electroacoustic transducer that converts electrical energy into sound energy, the speaker plays an indispensable role in the sound amplification system. The speaker is the weakest component in the sound amplification system, but it is also the most important component for the sound amplification effect. There are many types of speakers. Audio electrical energy vibrates the cone or diaphragm through electromagnetic, piezoelectric or electrostatic effects and resonates with the surrounding air to produce sound. Therefore, it is with the emergence of speakers that people can hear beautiful sounds.

[0003] Dynamic speakers have been widely used since their invention. Dynamic speakers are usually composed of T-iron, magnet, washer and voice coil. The magnet is mounted outside the magnet; the washer is arranged on the magnet, and the voice coil is located above the T-iron; the indispensable component is the voice coil, and the voice coil is wound by a coil. Affected by the structure of the speaker itself, the voice coil will generate heat after being energized due to the impedance of the voice coil. In fact, it is equivalent to a heating wire. When the dynamic speaker is running, the voice coil will emit a lot of heat, especially in high-power speakers. The voice coil power exceeds 1200W and the voice coil temperature exceeds 220 degrees, which makes the temperature of the magnetic circuit system too high, affecting heat dissipation, and causing the voice coil to be easily damaged; secondly, sometimes the flow of compressed air inside it will generate airflow sound, affecting the sound effect and affecting subsequent use.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the utility model aims to address the deficiencies in the prior art, and its main purpose is to provide a magnetic circuit structure with efficient heat dissipation. The structural design and coordination of the first semi-enclosed space and the air vents, and the second semi-enclosed space and the hollow channel, effectively solves the problem in the traditional technology that the temperature of the voice coil is excessive, the temperature of the magnetic circuit is too high, which affects the heat dissipation, causes the voice coil to be easily damaged, and the compressed air flows inside the voice coil to produce airflow sound, which affects the sound effect and thus affects the use.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A magnetic circuit structure with high efficiency in heat dissipation comprises a voice coil, a washer, a magnet and a T-iron; the magnet is sleeved outside the T-iron, and a first semi-enclosed space is formed between the inner wall of the magnet and the outer wall of the T-iron; the washer is arranged on the magnet, and an annular gap is formed between the inner wall of the washer and the outer wall of the T-iron; the voice coil is arranged above the T-iron, and a second semi-enclosed space is formed between the inner wall of the voice coil and the upper end surface of the T-iron;

[0008] The bottom of the T-iron is provided with air holes and hollow channels corresponding to the first semi-enclosed space and the second semi-enclosed space respectively; the air holes are connected to the first semi-enclosed space; and the hollow channels are connected to the second semi-enclosed space.

[0009] As a preferred solution, the voice coil includes a hollow tube and a coil located outside the hollow tube, and the coil is located in the annular gap.

[0010] As a preferred solution, a positioning column is protruding upward from the bottom of the T-iron, and the hollow channel runs through the bottom of the positioning column.

[0011] As a preferred solution, a plurality of air holes are provided at the bottom of the T-iron along the periphery of the hollow channel.

[0012] As a preferred solution, a first semi-enclosed space is formed between the inner wall of the magnet and the outer wall of the positioning column.

[0013] As a preferred solution, an annular gap is formed between the inner wall of the washer and the outer wall of the positioning column.

[0014] As a preferred solution, a second semi-enclosed space is formed between the inner wall of the voice coil and the upper end surface of the positioning column.

[0015] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it is mainly through the structural design and coordination of the first semi-enclosed space and the air vents and the second semi-enclosed space and the hollow channel that when the voice coil moves downward, the first semi-enclosed space and the second semi-enclosed space enter and exit through the air vents and the hollow channel respectively, thereby avoiding the generation of reverse airflow; the high-temperature air in the first semi-enclosed space and the second semi-enclosed space can be smoothly exchanged with the external low-temperature air, so that the heat generated by the voice coil can be discharged in time, which is convenient for air circulation and more conducive to heat dissipation, effectively reducing the temperature of objects and space in this area, thereby improving the heat dissipation efficiency of the entire magnetic circuit system.

[0016] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of an embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional view of an embodiment of the utility model;

[0019] Figure 3 It is an exploded view of an embodiment of the utility model;

[0020] Figure 4 It is another exploded view of an embodiment of the present utility model.

[0021] Description of the accompanying drawings:

[0022] 10. Voice coil 11. Hollow tube

[0023] 12. Roll width 20, T iron

[0024] 21. First semi-enclosed space 22. Second semi-enclosed space

[0025] 23. Annular gap 24. Ventilation hole

[0026] 25. Hollow channel 26. Positioning column

[0027] 30. Magnet 40. Washer. DETAILED DESCRIPTION

[0028] Please refer to Figures 1 to 4 As shown, it shows the specific structure of an embodiment of the utility model.

[0029] In the description of the present invention, it should be noted that directional words such as the terms "up", "down", "front", "back", "left", "right", etc., which indicate directions and positional relationships, are based on the directions or positional relationships shown in the drawings or during normal wearing and use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0030] A magnetic circuit structure with high efficiency in heat dissipation includes a voice coil 10, a T-iron 20, a magnet 30 and a washer 40.

[0031] Preferably, the voice coil 10 includes a hollow tube 11 and a coil 12 located outside the hollow tube 11 , and the coil 12 is located in the annular gap 23 described below.

[0032] The magnet 30 is sleeved outside the T-iron 20 , and the inner wall of the magnet 30 and the outer wall of the T-iron 20 form a first semi-enclosed space 21 ; preferably, the inner wall of the magnet 30 and the outer wall of the positioning column 26 described below form a first semi-enclosed space 21 .

[0033] The washer 40 is disposed on the magnet 30 , and an annular gap 23 is formed between the inner wall of the washer 40 and the outer wall of the T-iron 20 ; preferably, an annular gap 23 is formed between the inner wall of the washer 40 and the outer wall of the positioning column 26 described below.

[0034] The voice coil 10 is disposed above the T-iron 20 , and a second semi-enclosed space 22 is formed between the inner wall of the voice coil 10 and the upper end surface of the T-iron 20 ; preferably, a second semi-enclosed space 22 is formed between the inner wall of the voice coil 10 and the upper end surface of the positioning column 26 described below.

[0035] The bottom of the T-iron 20 is provided with air holes 24 and hollow channels 25 corresponding to the first semi-enclosed space 21 and the second semi-enclosed space 22, respectively; the air holes 24 are connected to the first semi-enclosed space 21; preferably, a plurality of air holes 24 are provided at the bottom of the T-iron 20 along the periphery of the hollow channel 25.

[0036] The hollow channel 25 is connected to the second semi-enclosed space 22. Preferably, a positioning column 26 is protruded upward from the bottom of the T-iron 20, and the hollow channel 25 passes through the bottom of the positioning column 26.

[0037] The design focus of the utility model is that, mainly through the structural design and coordination of the first semi-enclosed space and the air vents and the second semi-enclosed space and the hollow channel, when the voice coil moves downward, the first semi-enclosed space and the second semi-enclosed space enter and exit respectively through the air vents and the hollow channel, thereby avoiding the generation of reverse airflow; the high-temperature air in the first semi-enclosed space and the second semi-enclosed space and the external low-temperature air can be smoothly exchanged, so that the heat generated by the voice coil can be discharged in time, which is convenient for air circulation and more conducive to heat dissipation, effectively reducing the temperature of the object and the space temperature in this area, thereby improving the heat dissipation efficiency of the entire magnetic circuit system.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A magnetic circuit structure with high efficiency heat dissipation, characterized by: The invention comprises a voice coil, a washer, a magnet and a T-iron; the magnet is sleeved outside the T-iron, and a first semi-enclosed space is formed between the inner wall of the magnet and the outer wall of the T-iron; the washer is arranged on the magnet, and an annular gap is formed between the inner wall of the washer and the outer wall of the T-iron; the voice coil is arranged above the T-iron, and a second semi-enclosed space is formed between the inner wall of the voice coil and the upper end surface of the T-iron; an air vent and a hollow channel are respectively arranged at the bottom of the T-iron corresponding to the first semi-enclosed space and the second semi-enclosed space; the air vent is connected to the first semi-enclosed space; and the hollow channel is connected to the second semi-enclosed space.

2. The magnetic circuit structure with high efficiency heat dissipation according to claim 1, characterized in that: The voice coil comprises a hollow tube and a coil located outside the hollow tube, and the coil is located in an annular gap.

3. The magnetic circuit structure with high efficiency heat dissipation according to claim 1, characterized in that: A positioning column is protruded upwardly from the bottom of the T iron, and the hollow channel runs through the bottom of the positioning column.

4. The magnetic circuit structure with high efficiency heat dissipation according to claim 1, characterized in that: A plurality of air holes are arranged at the bottom of the T-iron along the outer periphery of the hollow channel.

5. The magnetic circuit structure with high efficiency heat dissipation according to claim 3, characterized in that: A first semi-enclosed space is formed between the inner wall of the magnet and the outer wall of the positioning column.

6. The magnetic circuit structure with high efficiency heat dissipation according to claim 3, characterized in that: An annular gap is formed between the inner wall of the washer and the outer wall of the positioning column.

7. The magnetic circuit structure with high efficiency heat dissipation according to claim 3, characterized in that: A second semi-enclosed space is formed between the inner wall of the voice coil and the upper end surface of the positioning column.

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